Congrats on the order! I've ordered a 2011 sedan in white myself.
From the research I've done, the exhaust IS different. mods as far as suspension, motor, and just about everything else mechanical will be the same.
I know the first mods I'll be doing will be the Cobb AccessPort. Eventually I'll try to get it to stage 2...still debating on whether to wait for my warranty to run out for that one