I see in the 810 FSM there is this spec: Pad Pressure = 17 Grams. Would this be the pressure exerted by the heads?
I don't see a comparable spec in the 1050 FSM.
But if this is the relevant spec, maybe it is a bit different/more for the XF551?
My experience with Blue Max disks on my XF551 was just like the op described with Wayout - the drive seemed to literally scrape the media off of the disk, creating a narrow ring where you could see right through the disk. The result was identical (same location on the disks) with two Blue Max disks that were both fine when used on an 810 but ruined by the XF551, but the XF551 never did that to any other disk.
I have seen scattered reports of similar experiences with the XF551 over the years, so that's why I suspect it's a result of something different about the XF551 compared to other Atari drives, even if the pre-existing condition/quality of certain disks is the bigger factor.