Seems they are same but ps5 has generally/more often higher dynamic resolutions in performance mode .
In quality mode ps5 is locked 4k where as xsx is still dynamic and can go down to 1870p in some scenes .
Quick summary:
Performance mode :
PS5 in dynamic 4K (2275x1280p ~ 3840x2160p)
XSX in dynamic 4K (1920x1080p ~ 3840x2160p)
XSS in dynamic 1080p (1280x720p ~ 1920x1080p)
Quality mode :
PS5 in native 4K (3840x2160p)
XSX in dyanmic 4K (3328x1872p ~ 3840x2160p)
XSS in dynamic 1440p (1920x1080p ~ 2560x1440p)
Framerate Performance Mode :
PS5: 59.99fps on average (Max: 60fps / min: 59fps)
XSX: 59.97fps on average (Max: 60fps / min: 56fps)
XSS: 47.06fps on average (Max: 60fps / min: 30fps)
*The PS5 in Performance mode has a strange bug that causes stuttering but not related to the game framerate.
Framerate Quality Mode :
PS5: 30.00fps on average (Max: 30fps / min: 30fps)
XSX: 30.00fps on average (Max: 30fps / min: 30fps)
XSS: 29.99fps on average (Max: 30fps / min: 27fps)
A little tearing on XSX and XSS in quality mode.
"PS5 in Performance Mode currently has a bug that causes stuttering unrelated to the games frame rate.
PS5 in Performance Mode uses a dynamic resolution with the highest native resolution found being 3840x2160 and the lowest native resolution found being approximately 2275x1280. PS5 in Performance Mode rarely renders at a native resolution of 3840x2160.
Xbox Series X in Performance Mode uses a dynamic resolution with the highest native resolution found being 3840x2160 and the lowest native resolution found being 1920x1080. Xbox Series X in Performance Mode rarely renders at a native resolution of 3840x2160.
The scene at 0:46 was where the lowest resolution was found and this scene seems to render at a higher average resolution on PS5 in Performance Mode than Xbox Series X in Performance Mode. However, in other scenes the PS5 and Xbox Series X render at a similar resolution in Performance Mode, and in some cases the Xbox Series X can render at a higher resolution than PS5."
PS5 and Xbox Series X in Performance Mode use a form of temporal reconstruction to increase the resolution up to 3840x2160 when rendering natively below this resolution.
Xbox Series S in Performance Mode uses a dynamic resolution with the highest native resolution found being 1920x1080 and the lowest native resolution found being approximately 1280x720. Xbox Series S in Perforamnce Mode uses a form of temporal reconstruction to increase the resolution up to 1920x1080 when rendering natively below this resolution.
The only resolution found on PS5 in Quality Mode was 3840x2160.
Xbox Series X in Quality Mode uses a dynamic resolution with the highest native resolution found being 3840x2160 and the lowest native resolution found being approximately 3328x1872. Drops in resolution below 3840x2160 on Xbox Series X in Quality Mode seem to be uncommon.
Xbox Series S in Quality Mode uses a dynamic resolution with the highest native resolution found being 2560x1440 and the lowest native resolution found being 1920x1080. Xbox Series S in Quality Mode uses a form of temporal reconstruction to increase the resolution up to 2560x1440 when rendering natively below this resolution."
Performance chart : ps5 has slight advantage in performance on top of the resolution advantage)