Canon R6 mark II already has 24.2 MP sensor, not 20.
Come on, every one knows the R6III is getting the same sensor as the R3 or a slight variant of it. Hence, the 1/180-1/200s sensor readout speed.Will make the Nikon's semi-stacked sensor at 1/68s look pedestrian, and the A7IV's at 1/15s look absolutely pathetic.
And the main question now is: Will r6iii sensor show better low light perfomance than z6iii or canon will be noisier as it was with similar sensors of different brand on pre eos R era?