Well this one remains very similar in most aspects but i think its a new map, but im not 100% sure. Theres the addition of american cars and I guess there is a slightly higher level of customization. I also hear that you can now custom paint your car to the last pixel (literally).
Im kinda hoping that the handling is tweaked just a bit and maybe the ai but in Zero the variety was great anyway. I wonder how many cars in total there are.