Vastly more megapixels (photo)
10% more megapixels (photo)
A little larger sensor
15 x 22.5 mm
14.9 x 22.3 mm
1.57% larger sensor. The larger the sensor the more light the sensor captures yielding in better image quality.
Way lower noise at high ISO
8.43% lower noise at high ISO. The maximum ISO at which the device still captures excellent quality images. Source: DxOMark.
Has a flip-out screen
Flip-out screens are useful for doing tricky shots.
A shade better image quality
2 better image quality. A device's overall image quality score considers: color depth, dynamic range and low light performance. Source: DxOMark.
A little lighter
65 g lighter
Clearly higher maximum light sensitivity
2x higher maximum light sensitivity. With a higher light sensitivity (ISO level), the sensor absorbs more light. This can be used to capture moving objects using a fast shutter speed, or to take images in low light without using a flash.
Slightly better color depth
2.27% better color depth. The better a device's color depth the more color nuances it can distinguish. Source: DxOMark.
The device can connect to WiFi.
Has a stereo microphone
A stereo microphone allows to record audio files or movies in stereo without an external microphone.
Substantially longer battery life
120 shots longer battery life. CIPA is an independent, standard measurement that determines how many shots a camera can take before the battery dies.
A little higher pixel density
6.37% higher pixel density
Measurably higher resolution
13.18% higher resolution
A tad less body volume
5.58% less body volume
9.20 mm narrower
Has a microphone in
A microphone port allows connecting external high-end or specialized microphones.
Significantly higher resolution (screen)
1040 k dots
920 k dots
120 k dots higher resolution (screen). A higher screen resolution provides a sharper image, making it easier to review your photos.
6.70 mm shorter
Has a touch screen
You can operate the device easily, by pressing the screen with your fingers.
Has touch autofocus
The autofocus is immediately set to the subject by just touching it on the touch screen.
Newer DIGIC version
Newer DIGIC version. Newer image processors are better at processing multiple tasks simultaneously, and can produce higher quality images with better low-light performance and faster AF.
Cross-type focus points
The 70D has 19 cross-type focus points, while the D7100 only has 15
Much faster and more accurate focus in Live-View
Autofocus in Liveview is much faster on the 70D due to the dual-pixel-sensor. It hits the spot nearly every time, unlike contrast-detection.