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- Simon
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The A9 and A7R IV are similar but the buttons are a bit bigger and more positive on the A&R IV. Shutter better but the big difference in use is the AF-On button which falls much nicer to the thumb.Ahh I have the A9-II and IIRC the buttons are the same as the A7RIV, as is the grip. The big difference is the drive dial on the A9-II vs the R4.