PS5 XSX
Native 4K. “Basically identical”
“PlayStation 5 and Series X render proceedings at native 2160p resolution and barring some very minor differences (a slight difference in select filtering? An odd water rendering bug in one scene on Series X?) they are basically identical.”
XSS
1080p
Lower detail level
Performance
-Frame rate dips “harder” on XSX than PS5, sometimes up to 9-11 frames per second.
-Series S at 1080p operates much the same as Series X, sometimes a little smoother but more often than not, 2-3fps slower.
Interesting tidbit:
“I can well believe that the conspiracy theorists will be full-throated in pointing out performance differentials between PS5 and Xbox Series X that are somewhat at odds with the technical specification of the consoles, but the fact that Xbox One X gives a smoother ride than PS4 Pro hopefully underscores that San Diego Studio gave the Xbox ports a good shot.”