But are those all at full resolution and bit depth? The sony manual has a lot of qualifiers for 20FPS: Use electronic shutter, the right lens(!!!), compressed raw. If you want full resulution and bitdepth for your raw files, it's suddenly 12FPS. And if you want to use the mechanical shutter it's only 5FPS.If Nikon can move 45 MP at 9 FPS in D850 with their grip, then Canon should be able to move 30MP at 1.5*9 FPS or 13/14 FPS.
Sony does 10 FPS at 42MP in the A7R III and the A9 does 20 FPS at 24MP.