Ifthe Xbox had a higher framerate and a higher resolution, you'd be right to say that, but it doesn't. Developers just always seem to aim for a higher resolution on Xbox at the expense of a locked 60. PS5 generally has a lower resolution but almost always a locked 60, it's just a matter of what the developers go for.
ACValhalla tested on the GTX 1080 at 1920x1080 and 2560x1440 resolutions, using the Medium, High and Very high settings with low AA and no Motion Blur.⏱ Tim VWl6l8w.