Taking a step back, the R5 is really Canon's comparable "Flagship" and the R1 is really a unique offering aimed at a specific audience. The R5/A1/Z8 have similar MP (45-50) and fps (10-12 mechanical and up to 30 electronic). A simplistic comparison, sure, but two key features that are almost identical.

Going back 12 years, the 5D3 was 6 fps and the 1Dx was 12 fps. At the time, that was a significant and meaningful differentiation.

I am sure they are coming, but it will be interesting to see the comparisons of the R5 II to the A1 and Z8. But I might adjust my thinking a bit and start considering the R5 II as a co-Flagship camera.