Graphically this game is spot on. The cars look stunning, the scenery looks stunning and it all moves at fantastic pace to give a real impression of speed, and there are no graphical errors or break that I can see.
The PC version has greater resolution assuming you graphics card can handle it. I have tried it on 6800gt 256mb and it runs well in 1040 res. But on my 8800gt 512mb it runs brilliantly at 1680 res.
If you have a 360 controller, the game plays exactly the same as the 360 version.
My copy for the PC cost a tenna from playtrade , which is really great value.
Having played the 3 main versions on both consoles and PC, I can confirm they are all the same. With the pc being slightly better looking.
A great game, that is a must for the PC.