Sometimes...
Gameplay looks "okay" for XIII so far, but we haven't seen enough of it yet, like summons and limits and so forth.
As for the graphics, yes, sometimes i do buy games just for the HD Experience... uhm...
I think DOA: Extreme for the 360 and Folklore for PS3 are the best examples i could give this gen.
But to be honest its not really the graphics as more of it is the "ART-STYLE" which from the two pics above number 2 looks anime-cliched to hell, which ISN'T a bad thing, but VS the 1st one im sorry it kinda is, the detail in the first is far better in everyway from hair to rock.