For the exterior, are they the same car? Obviously the drivetrain is different, but I need to know if the shell is the same. It looks identical in the pics. Reason being, I want to purchase Vent Visors for my windows, but I can't find them for the S4. But I found a company that has them for the 100 quattro, and they couldn't tell me if they would fit the S4 or not. The only thing they could tell me is that they would fit the 100 quattro. Any help would be greatly appreciated if you knew the answer to this or if you know of a company/supplier that does have the vent visors for sale.