They updated and you can now change rims on standard cars (you could always change them on premium)... They also make tire smoke and skid marks. You can customize front and rear diffusers on premium cars and standards you can add a park bench spoiler. They actually made a lot of decent updates, but I have no interest in arguing over which is better. I don't own an xbox, nor do I plan on running out and buying one any time in the near future.
Doesn't come up as valid with the j. I tried without and it went through. If that's not you, my PSN is the same as my forum name.