Quite a few. Have to pay again (for ps3 software), no teamspeak, no add-ons (Only popularized ones), same graphics, YLOD, possible segregation from PC community since you won't have damage parsers or teamspeak annnd that's all (People will say Ps3 Limitations but that won't come for a long while anyways). But regardless the Ps3 is very accessible so quite a few Ps3 players would play alongside you anyways.