have you seen Conker Live and Reloaded, Splinter Cell Chaos Theory or Ninja Gaiden Black at ~1920p on One X?
fuck yes they compare favourably... these games look fantastic still.
PS2 backwards compatibility will only be interesting for exclusives, Multiplatform games that are backwards compatible I would rather play on Xbox since Xbox versions were just way better.
See Max Payne 1 and 2, absolutely atrocious PS2 ports but they had really good Xbox ports.
also, the og Xbox has some hidden treasures that are not backwards compatible yet, and I hope that will change when Series X comes out.
Jet Set Radio Future, Otogi 1 and 2, Crazy Taxi 3 are the 4 games that I want the most to finally be backwards compatible and improved for modern TVs.
that's especially true since Xbox emulation on PC is still horrible and almost not existent actually.
meanwhile I can basically already play all PS1 and PS2 games enhanced on my PC
that's why Xbox BackCompat is a bigger deal than PS 1&2 BackCompat IMO