Clearly more focus points
36 more focus points. The more focus points the more flexibility in picking which part of the scene to focus on. They also give the image sensor a better probability in identifying the right area of the scene to focus on in more automatic modes.
Measurably faster shooting at highest resolution with AF as JPEG format
28.21% faster shooting at highest resolution with AF as JPEG format. Fast continuous shooting is useful for catching action shots.
Appreciably longer battery life
950 shots longer battery life. CIPA is an independent, standard measurement that determines how many shots a camera can take before the battery dies.
Sizably faster flash X-sync
1.50x faster flash X-sync. Flash synchronization is defined as the firing of a photographic flash coinciding with the shutter admitting light to the image sensor. In general, faster flash sync speeds are better if the photographer needs to flash-fill subjects that are backlit and wants to avoid motion blur, or wants to increase depth of field by using a high aperture.
A tad more viewfinder coverage
2 % more viewfinder coverage. With 100% coverage you can compose the image correctly when you capture the photo. With less than full coverage you may have to crop your photos afterwards to get them looking perfect.
Has dual card slots
It has two memory card slots, allowing you to store more photos without switching cards. This is particularly useful on long shoots when you need more space.