Yes the quality mode on XSX seems to be an exclusive mode for that machine with stuff not seen on the others machines (like swaying trees in the wind). So it seems they have already done the next gen patch on XSX.The versions for Xbox Series have been tinkered as the Xbox Series S would otherwise been running the base version resolution.
PS4 Pro code for PS5 probably also resolution limits raised. Most of the fps boost comes from Zen2
In this video when they are comparing XSX vs PS5 (except in the framerate comparison) they are using the 30fps quality mode on XSX (around 1600p) against the 60fps mode on PS5.
Finally the framerate at 60fps on both consoles seems to be more stable on PS5.