I'm sure the sensor has the same treatments done on the 5dIV sensor for the R. Microlenses, more dpaf points, etc.
I'm curious to see how the firmware upgrades are. If this sensor can do 5 frames per second while autofocusing, I imagine the R can do at least the 8 that it can currently do without continuous focus? The underlying hardware should be the same, so they might have made some improvements with 1.x of the firmware. If they do that and are able to achieve eye focus comparable to the sony a7III (pre their new update) they will actually be on the road to catching up with Sony on the few specs that *actually* matter. (the ISO expansion range difference being negligible in most real world scenarios).