I got Grid for my Bday and have played maybe a couple hours now. Um, it's a blast. I like the crash derby and the drifting races a lot. They are a nice change of pace. Finally a game that does realistic car damage. Sony's GT games were always missing that and an AI worth a damn that made the game challenging.
I've got GTR2 on my PC as well and I'll go ahead and say it is a more realistic racing sim. My problem with GTR2 was the difficulty was way, way, way higher than my skill set. Playing it made me feel like I'd never before even driven a real car let alone played racing sims before.
Granted GTR2 has a lot of tools that allow you to update the content, cars, music and tracks within the game. I think so far I like Grid better. Although, I'm really annoyed with the fact that my PS2/PC logiteck racing wheel doesn't seem to be supported. I got it working, but for some reason the gas is always on.
Anyway I'll keep playing and maybe I'll get to race some of you guys online sometime soon.

