Looks like I may possibly be staying in the MIchigan area and thereby would prefer the 328xi 4 wheel option instead of the 335. I really like the star spoke rims in the sports packages on both but noticed that the only aesthetic difference is that they are 17 inch on the 328xi and 18 inches on the 335. Is this correct? Would the 2 cars look pretty much identically except for 17 inches versus 18 inches? Can someone tell me if there will be any other differences except for the engines and 4 wheel drive?