I got the PC version and I played the 360 demo version. To me the PC version does look clearly better, some areas are more different than others. My PC is over a year old now, but I got consistantly better framerates on the PC version than the 360 version. Also, the lag in the 360 version was just horrible, the PC version on a good server is quite good. I think the 360 has a much cooler title screen however.
JigenD2's comments