According to DPReview the 20fps electronic shutter mode of the camera is not so usable, so the usable mode is actually 12fps in mechanical mode … so the comparison should be made on 10 vs 12 fps
We believe you’re much more likely to see the distortion of the R6’s electronic shutter in action images than notice the loss of dynamic range of the Sony, so that leaves it as a 12fps* vs 10fps* battle that we’d struggle to choose between, by the time we’ve taken resolution into account.
The Canon promises most and probably deserves the bigger asterisk next to those claims. Its headline claim is the ability to shoot at up to 20 fps, but this requires that you use the electronic shutter mode, which is likely to distort your subject if it moves too quickly across the frame. Raw shooting drops to 12-bit mode (reducing the amount of dynamic range in the files) in electronic shutter mode.
The Sony has fewer restrictions for its 10 fps mode, but there’s still plenty of small print. Again it drops to 12-bit when shooting continuous bursts and it can only maintain its full speed in the lossy compressed Raw mode, meaning less dynamic range and an additional risk of artifacts if you try to push the files too far. .
