Why do people compare this game's resolution to that in AC Valhalla, when the whole point of what Alex said is how expensive RT is?
Comparisons will come soon enough, but I must say it was pretty funny seeing some fans trying to flex native 4k, only to get the news of the 1440p native res on their platform (so not even half the pixel count of native 4K). That was instant karma.
At some point comparison videos will pop and all this stupidity should stop. Those platforms are very similar and no amount of faerie dust will change that. Multiplatform will run and play the same on both, whatever fans want.
If you like Sony exclusives like apparently most people do, go PS5, and if you prefer cheap Gamepass and small AA games (and you don't have a PC), go XSX, but performance difference between both platforms will never be a factor, this era ended long ago. Both will play the multiplatform games the same and both pretty well, if only due to diminishing returns and very similar architectures.
As usual though, Sony exclusives should look a lot better than anything else, not only because of talent and budget, but because they have to run and optimize the game only on 1 platform (PS5), vs dozens for MS (XSX, XSS, any PC).