Ive played both. I rented the ps3 version and own the 360 version. I had to play the ps3 version with my night vision on all the time due to the dark and fuzzy graphics.
Graw 2 on the other hand is awesome on ps3.
[quote name='mykevermin']I've read that Vegas on the PS3 has some problems online, but I haven't played it myself, so I can't attest to anything.[/quote]