Dual SD card slots, compared to a single slot in the α7R II. However, the slots do not exactly match. One is an SD-only slot that fully exploits UHS-II technology. The other is a slower UHS-I slot that also supports Sony's legacy Memory Stick Duo cards.
Improved shutter mechanism to reduce shutter-induced shake
Pixel shift multi-shot mode that combines exposures taken on each subpixel of the Bayer filter, improving overall image quality