I think its just the rear splitter thats different,will have to go look,been driving the 325 mostly.Plastic is the best,the autostyle ones look the part,but sometimes dont align perfectgly.
And as for the other conversation,yes,the shocks are different,when you lower a car,you put in shorter shock.else youre shock will be compressed permanently and thus will not be able to perform as it was designed to!