I don't think there's any videos but I know there are some screenshots of both of the games for the XBOX, they look much better than the PS2.
I just recently played Vice City on PC and PS2. The PC version has way better graphics than the PS2, one thing I hate about VC on PS2 is when you're driving everything seems to be blurry, it annoys me so much and makes me think my visions messed up or something, maybe I got used to the PC version cus I played it first. I never got this problem on the PC. Just hate typing in the cheats.