I was talking about XSX vs. PS5. But even so, the update only included PSSR in all modes (with its pros and cons) and RT reflections in Balanced mode (also at a cost) No further improvement was mentioned in the comparison videos on TAAU modes.
In videos after the patch, the draw distance in performance mode is still the same on PS4 (I don't know if it's different on Pro).
Regarding the initial post of discussion , the fact is that XSX has an advantage in average DRS resolution over PS5 in AC Shadows, and it also has an advantage in many other third-party games, and it's not just "only in first-party Xbox games like Doom DA because it's better optimized on XSX than on PS5".
Looking at this information in the thread, it's clear that there was an extra of FPS on XSX, and therefore, at least at launch, it could have included a slightly superior graphics option.
Nowadays, when porting games, the graphics engine itself initially adapts the graphics specifications to the performance offered by the platform, based on a performance target. Then comes the work of optimizing and improving performance to fine-tune the specifications to that target as best as possible. XSX may have reached that target earlier, and this difference was a result of the specific situation.