Well, if you have a powerfull enough computer it's defenatly going to be better graphics (and no, I'm not just pulling that out of my butt), seeing as the PC is far superior than PS2 and other consoles.
I heard an argument about having to use the keyboard to play. Well you can actually buy an adapter to use your PS2 controller on the PC. So there's that problem sorted out.
Either way I'm getting the PC version, reasons are that I am getting a beafed up computer for Christmas and also because that way I can import it from America.