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 .
Performance mode :
PS5 in dynamic 4K (2275x1280p ~ 3840x2160p)
PS5: 30.00fps on average (Max: 30fps / min: 30fps)
Quality mode :
PS5 in native 4K (3840x2160p)
PS5: 59.99fps on average (Max: 60fps / min: 59fps)
Even though I'm a big fan of owning physical copies of games, to get this kind of performance out of a $399 in 2020 is fucking crazy.
Price to hardware ratio wise, who ever is able to secure a digital PS5 is getting a bargain right now