As soon as I started to play this game, I could see they have made huge improvements on the previous game, although Dirt 1 is still an excellent game.
The menus are a lot better than Dirt 1 and arent so plain and boring. However the gameplay is pretty much the same, but theres more features such as different gameplay modes.
I also agree with other reviewers who said the graphics are amazing. Personally, I think they are virtually the same with only slight differences.