73points

Samsung Galaxy A51

67points

Xiaomi Redmi Note 9 Pro

vs
vs

142 facts in comparison

Samsung Galaxy A51 vs Xiaomi Redmi Note 9 Pro

Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
73
points
Samsung Galaxy A51
67
points
Xiaomi Redmi Note 9 Pro

Why is Samsung Galaxy A51 better than Xiaomi Redmi Note 9 Pro?

  • 2.53% higher pixel density
    ?

    405ppivs395ppi
  • 3.9% faster CPU speed
    ?

    4 x 2.3GHz & 4 x 1.7GHzvs2 x 2.3 & 6 x 1.8GHz
  • 2GB more RAM memory
    ?

    8GBvs6GB
  • 2x more megapixels (front camera)
    ?

    32MPvs16MP
  • Has built-in optical image stabilization
    ?
  • 37g lighter
    ?

    172gvs209g
  • Has a BSI sensor
    ?
  • 0.9mm thinner
    ?

    7.9mmvs8.8mm

Why is Xiaomi Redmi Note 9 Pro better than Samsung Galaxy A51?

  • 25.5% more battery power
    ?

    5020mAhvs4000mAh
  • 12.86% more megapixels (main camera)
    ?

    64MP & 8MP & 5MP & 2MPvs48 & 12 & 5 & 5MP
  • 2.62% bigger screen size
    ?

    6.67"vs6.5"
  • Weather-sealed (splashproof)
    ?
  • 5% wider aperture at minimum focal length
    ?

    f/1.9 & f/2.2 & f/2.4 & f/2.4vs2 & 2.2 & 2.4 & 2.2f
  • Has an IPS screen
    ?
  • 2 newer Gorilla Glass version
    ?

    5vs3
  • 2nm smaller semiconductor size
    ?

    8nmvs10nm

Price comparison

Samsung Galaxy A51

ProductStorePrice
Samsung Galaxy A51 AmazonSamsung Galaxy A51 (SM-A515F/DS) Dual SI...Samsung Galaxy A51 (SM-A515F/DS) Dual SIM 128GB, GSM Unlocked - Prism Crush Black
Amazon logo
$272.99
Samsung Galaxy A51 AmazonSamsung Galaxy S9, 64GB, Midnight Black ...Samsung Galaxy S9, 64GB, Midnight Black - Fully Unlocked (Renewed)
Amazon logo
$259.00
Samsung Galaxy A51 AmazonSamsung Galaxy A71 SM-A715F/DS 4G LTE 12...Samsung Galaxy A71 SM-A715F/DS 4G LTE 128GB + 6GB Ram Octa Core LTE USA w/Four Cameras (64+12+5+5mp) Android (Prism Crush Silver)
Amazon logo
$354.99
Samsung Galaxy A51 AmazonSamsung Galaxy A31-128GB / 4GB - A315G/D...Samsung Galaxy A31-128GB / 4GB - A315G/DSL Unlocked Dual Sim Phone w/Quad Camera 48MP+8MP+5MP+5MP GSM International Version (Prism Crush White)
Amazon logo
$234.99
Samsung Galaxy A51 AmazonSamsung Galaxy A70 A705M 128GB DUOS GSM ...Samsung Galaxy A70 A705M 128GB DUOS GSM Unlocked Android Phone W/Dual 32MP Camera (International Variant/US Compatible LTE) - Black
Amazon logo
$339.99
Samsung Galaxy A51 AmazonSamsung Galaxy A70 A705M 128GB DUOS GSM ...Samsung Galaxy A70 A705M 128GB DUOS GSM Unlocked Android Phone W/Dual 32MP Camera (International Variant/US Compatible LTE) - Blue
Amazon logo
$334.80
Samsung Galaxy A51 AmazonSamsung Galaxy A50 Verizon, 64GB Black (...Samsung Galaxy A50 Verizon, 64GB Black (Renewed)
Amazon logo
$231.99
Samsung Galaxy A51 aliexpressGlobal Version Samsung Galaxy A51 A515F/...Global Version Samsung Galaxy A51 A515F/DSN Mobile Phone 128GB ROM 8GB /6GB RAM 6.5" 1080 x 2400 48MP 4000mAh NFC 4G Smartphone
aliexpress logo
$294.74
Samsung Galaxy A51 walmartVerizon Samsung Galaxy A51 128GB, Black ...Verizon Samsung Galaxy A51 128GB, Black - Upgrade Only
walmart logo
$10.38

Xiaomi Redmi Note 9 Pro

ProductStorePrice
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 9 Pro 128GB + 6GB RAM,...Xiaomi Redmi Note 9 Pro 128GB + 6GB RAM, 6.67" FHD+ DotDisplay, 64MP AI Quad Camera, Qualcomm Snapdragon 720G LTE Factory Unlocked Smartphone - International Version (Tropical Green)
Amazon logo
$289.99
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 9 Pro 64GB + 6GB RAM, ...Xiaomi Redmi Note 9 Pro 64GB + 6GB RAM, 6.67" FHD+ DotDisplay, 64MP AI Quad Camera, Qualcomm Snapdragon 720G LTE Factory Unlocked Smartphone - International Version (Tropical Green)
Amazon logo
$245.00
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 9S 6.67" 48MP Internat...Xiaomi Redmi Note 9S 6.67" 48MP International Global Version (Aurora Blue, 6GB/128GB)
Amazon logo
$239.50
Xiaomi Redmi Note 9 Pro AmazonXiaomi REDMI Note 9 Dual 128GB Interstel...Xiaomi REDMI Note 9 Dual 128GB Interstellar Grey (M2003J15SS)
Amazon logo
$194.90
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 8 128GB 4GB RAM 48MP F...Xiaomi Redmi Note 8 128GB 4GB RAM 48MP Factory Unlocked Global Version Dual SIM Smartphone (Neptune Blue)
Amazon logo
$199.99
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi 9 64GB, 4GB RAM, 6.53" Full...Xiaomi Redmi 9 64GB, 4GB RAM, 6.53" Full HD + AI Quad Camera, LTE Factory Unlocked Smartphone - International Version (Sunset Purple)
Amazon logo
$174.99
Xiaomi Redmi Note 9 Pro aliexpressXiaomi Redmi Note 9 Pro (64GB/128GB ROM ...Xiaomi Redmi Note 9 Pro (64GB/128GB ROM 6GB RAM Cámara Cuádruple de 64 MP Android Nuevo Móvil) [Teléfono Móvil Versión Global]
aliexpress logo
$217.00
Xiaomi Redmi Note 9 Pro walmartXiaomi Redmi Note 9 Pro 128GB 6GB RAM GS...Xiaomi Redmi Note 9 Pro 128GB 6GB RAM GSM Unlocked Global Version (Tropical Green)
walmart logo
$281.99

Design

1.weather-sealed (splashproof)
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
The device is protected with extra seals to prevent failures caused by dust, raindrops, and water splashes.
2.weight

172g

209g

We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
3.thickness

7.9mm

8.8mm

We consider a thinner chassis better because it makes the product more compact and portable. Thinness is a feature highlighted by many manufacturers of mobile devices, but it is essential for a wide range of products.
4.height

158.5mm

165.8mm

The height represents the vertical dimension of the product. We consider a smaller height better because it assures easy maneuverability.
5.width

73.6mm

76.7mm

The width represents the horizontal dimension of the product. We consider a smaller width better because it assures easy maneuverability.
6.volume

92.16cm³

111.91cm³

Volume is the quantity of three-dimensional space enclosed by the product's chassis or, in simpler terms, the space the product occupies.

Display

1.pixel density

405ppi

395ppi

Pixel density is a measurement of a screen's resolution, expressed as the number of pixels per inch (PPI) on the screen. A higher pixel density translates into more clarity and sharpness for the images rendered on the screen, thus improving the quality of the viewing experience.
2.resolution

1080 x 2400px

1080 x 2400px

Resolution is an essential indicator of a screen's image quality, representing the maximum amount of pixels that can be shown on the screen. The resolution is given as a compound value, comprised of horizontal and vertical pixels.
3.screen size

6.5"

6.67"

The bigger the screen size is, the better the user experience.
4.has branded damage-resistant glass
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
Damage-resistant glass (such as Corning Gorilla Glass or Asahi Dragontrail Glass) is thin, lightweight, and can withstand high levels of force.
5.has an IPS screen
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
IPS (In-Plane Switching) is a technology used for LCDs. It was designed to overcome the main limitations of conventional twisted nematic TFT displays: limited viewing angles and low-quality color reproduction. PLS (Plane-to-Line Switching) is a type of IPS screen developed by Samsung, with increased brightness and lower production costs.
6.Gorilla Glass version

3

5

Gorilla Glass is one of the most popular brands of chemically strengthened glass, manufactured by Corning. Several versions have been developed, the newer ones being more durable and providing better damage resistance.

Performance

1.CPU speed

4 x 2.3GHz & 4 x 1.7GHz (Samsung Exynos 9611)

2 x 2.3GHz & 6 x 1.8GHz (Qualcomm Snapdragon 720G)

The CPU speed indicates how many processing cycles per second can be executed by a CPU, considering all of its cores (processing units). It is calculated by adding the clock rates of each core or, in the case of multi-core processors employing different microarchitectures, of each group of cores.
2.RAM

8GB

6GB

Random-access memory (RAM) is a form of volatile memory used to store working data and machine code currently in use. It is a quick-access, temporary virtual storage that can be read and changed in any order, thus enabling fast data processing.
3.has an external memory slot
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
The device has a standard memory slot (such as an SD or micro SD card slot) that enables you to extend the built-in internal storage with affordable memory modules, or easily retrieve data, such as photographs, from the memory card.
4.internal storage

128GB

128GB

The internal storage refers to the built-in storage space available in a device for system data, apps, and user-generated data. With a large amount of internal storage, you can save more files and apps on your device.
5.Has integrated LTE
Samsung Galaxy A51 (Samsung Exynos 9611)
Xiaomi Redmi Note 9 Pro (Qualcomm Snapdragon 720G)
The system on a chip (SoC) has an integrated LTE cellular chip. LTE is capable of downloading at faster speeds than older, 3G technology.
6.semiconductor size
Small semiconductors provide better performance and reduced power consumption. Chipsets with a higher number of transistors, semiconductor components of electronic devices, offer more computational power. A small form factor allows more transistors to fit on a chip, therefore increasing its performance.

Cameras

1.megapixels (main camera)

48MP & 12MP & 5MP & 5MP

64MP & 8MP & 5MP & 2MP

The number of megapixels determines the resolution of the images captured with the main camera. A higher megapixel count means that the camera is capable of capturing more details. However, the megapixel count is not the only important element determining the quality of an image.
2.megapixels (front camera)

32MP

16MP

The number of megapixels determines the resolution of the images captured with the front camera. A higher megapixel count means that the front camera is capable of capturing more details, an essential factor for taking high-resolution selfies.
3.has built-in optical image stabilization
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
Optical image stabilization uses gyroscopic sensors to detect the vibrations of the camera. The lens adjusts the optical path accordingly, ensuring that any type of motion blur is corrected before the sensor captures the image.
4.video recording (main camera)

2160 x 30fps

2160 x 30fps

The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.
5.wide aperture (main camera)

f/2 & f/2.2 & f/2.4 & f/2.2

f/1.9 & f/2.2 & f/2.4 & f/2.4

With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.
6.Has a dual-tone LED flash
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
A dual-tone flash has LED lights with different color temperatures, delivering a better color balance to photos and videos.

Audio

1.has stereo speakers
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
2.has a socket for a 3.5 mm audio jack
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
With a standard mini jack socket, you can use the device with most headphones.
3.Has a radio
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
A built-in FM radio tuner allows you to listen to most of the live-broadcasted FM radio stations without using the internet.
4.number of microphones

2

2

More microphones result in better sound quality and enable the device to filter out background noise.

Battery

1.battery power

4000mAh

5020mAh

Battery power, or battery capacity, represents the amount of electrical energy that a battery can store. More battery power can be an indication of longer battery life.
2.has wireless charging
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
The manufacturer offers a branded wireless charging kit. To charge the device, you simply put it down on its charging base.
3.has a removable battery
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
The battery is removable and can be replaced by the user if broken.
4.Supports fast charging
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
Fast charging technologies, like Qualcomm’s Quick Charge or MediaTek’s Pump Express, are used to reduce the time it takes to charge a device. For example, with Quick Charge 3.0, the battery can be charged to 50% in just 30 minutes.
5.Has an ultra power-saving mode
Samsung Galaxy A51 (Android 10)
Xiaomi Redmi Note 9 Pro (Android 10)
The ultra power-saving mode, also called low power mode, is an effective way to extend the battery life of the device. Usually, it involves limiting screen brightness and contrast, disabling location services, restricting connectivity, and turning off nonessential apps.
6.has a battery level indicator
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
An indicator shows you when the device has low battery.

Features

1.download speed

600MBits/s (Samsung Exynos 9611)

600MBits/s

The download speed is a measurement of the internet connection bandwidth, representing the maximum data transfer rate at which a device can access online content.
2.supports Wi-Fi 5 (802.11ac)
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
802.11ac wireless works on the 5GHz frequency range. It offers higher transfer rates, improved reliability, and improved power consumption. It provides advantages for gaming and HD video streaming.
3.has NFC
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
NFC (near-field communication) allows a device to perform simple wireless transactions.
4.Has a fingerprint scanner
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
The device has a fingerprint scanner which identifies the user.
5.is DLNA-certified
Samsung Galaxy A51
Xiaomi Redmi Note 9 Pro
All DLNA-certified products are compatible with one another. When different devices are connected to the same network, data can be transferred easily between them.
6.Bluetooth version

5

5

Bluetooth is a wireless technology standard that allows data transfers between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves. Newer versions provide faster data transfers.

Price comparison

Samsung Galaxy A51

ProductStorePrice
Samsung Galaxy A51 AmazonSamsung Galaxy A51 (SM-A515F/DS) Dual SI...Samsung Galaxy A51 (SM-A515F/DS) Dual SIM 128GB, GSM Unlocked - Prism Crush Black
Amazon logo
$272.99
Samsung Galaxy A51 AmazonSamsung Galaxy S9, 64GB, Midnight Black ...Samsung Galaxy S9, 64GB, Midnight Black - Fully Unlocked (Renewed)
Amazon logo
$259.00
Samsung Galaxy A51 AmazonSamsung Galaxy A71 SM-A715F/DS 4G LTE 12...Samsung Galaxy A71 SM-A715F/DS 4G LTE 128GB + 6GB Ram Octa Core LTE USA w/Four Cameras (64+12+5+5mp) Android (Prism Crush Silver)
Amazon logo
$354.99
Samsung Galaxy A51 AmazonSamsung Galaxy A31-128GB / 4GB - A315G/D...Samsung Galaxy A31-128GB / 4GB - A315G/DSL Unlocked Dual Sim Phone w/Quad Camera 48MP+8MP+5MP+5MP GSM International Version (Prism Crush White)
Amazon logo
$234.99
Samsung Galaxy A51 AmazonSamsung Galaxy A70 A705M 128GB DUOS GSM ...Samsung Galaxy A70 A705M 128GB DUOS GSM Unlocked Android Phone W/Dual 32MP Camera (International Variant/US Compatible LTE) - Black
Amazon logo
$339.99
Samsung Galaxy A51 AmazonSamsung Galaxy A70 A705M 128GB DUOS GSM ...Samsung Galaxy A70 A705M 128GB DUOS GSM Unlocked Android Phone W/Dual 32MP Camera (International Variant/US Compatible LTE) - Blue
Amazon logo
$334.80
Samsung Galaxy A51 AmazonSamsung Galaxy A50 Verizon, 64GB Black (...Samsung Galaxy A50 Verizon, 64GB Black (Renewed)
Amazon logo
$231.99
Samsung Galaxy A51 aliexpressGlobal Version Samsung Galaxy A51 A515F/...Global Version Samsung Galaxy A51 A515F/DSN Mobile Phone 128GB ROM 8GB /6GB RAM 6.5" 1080 x 2400 48MP 4000mAh NFC 4G Smartphone
aliexpress logo
$294.74
Samsung Galaxy A51 walmartVerizon Samsung Galaxy A51 128GB, Black ...Verizon Samsung Galaxy A51 128GB, Black - Upgrade Only
walmart logo
$10.38

Xiaomi Redmi Note 9 Pro

ProductStorePrice
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 9 Pro 128GB + 6GB RAM,...Xiaomi Redmi Note 9 Pro 128GB + 6GB RAM, 6.67" FHD+ DotDisplay, 64MP AI Quad Camera, Qualcomm Snapdragon 720G LTE Factory Unlocked Smartphone - International Version (Tropical Green)
Amazon logo
$289.99
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 9 Pro 64GB + 6GB RAM, ...Xiaomi Redmi Note 9 Pro 64GB + 6GB RAM, 6.67" FHD+ DotDisplay, 64MP AI Quad Camera, Qualcomm Snapdragon 720G LTE Factory Unlocked Smartphone - International Version (Tropical Green)
Amazon logo
$245.00
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 9S 6.67" 48MP Internat...Xiaomi Redmi Note 9S 6.67" 48MP International Global Version (Aurora Blue, 6GB/128GB)
Amazon logo
$239.50
Xiaomi Redmi Note 9 Pro AmazonXiaomi REDMI Note 9 Dual 128GB Interstel...Xiaomi REDMI Note 9 Dual 128GB Interstellar Grey (M2003J15SS)
Amazon logo
$194.90
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi Note 8 128GB 4GB RAM 48MP F...Xiaomi Redmi Note 8 128GB 4GB RAM 48MP Factory Unlocked Global Version Dual SIM Smartphone (Neptune Blue)
Amazon logo
$199.99
Xiaomi Redmi Note 9 Pro AmazonXiaomi Redmi 9 64GB, 4GB RAM, 6.53" Full...Xiaomi Redmi 9 64GB, 4GB RAM, 6.53" Full HD + AI Quad Camera, LTE Factory Unlocked Smartphone - International Version (Sunset Purple)
Amazon logo
$174.99
Xiaomi Redmi Note 9 Pro aliexpressXiaomi Redmi Note 9 Pro (64GB/128GB ROM ...Xiaomi Redmi Note 9 Pro (64GB/128GB ROM 6GB RAM Cámara Cuádruple de 64 MP Android Nuevo Móvil) [Teléfono Móvil Versión Global]
aliexpress logo
$217.00
Xiaomi Redmi Note 9 Pro walmartXiaomi Redmi Note 9 Pro 128GB 6GB RAM GS...Xiaomi Redmi Note 9 Pro 128GB 6GB RAM GSM Unlocked Global Version (Tropical Green)
walmart logo
$281.99

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