Two Coupes with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, and maximum occupancy. First of all, the 2016 Mercedes-Benz E-Class Coupe is priced $16,700 lower compared to the base MSRP of the 2015 Audi RS 5 Coupe. Also, the 2015 RS 5 Coupe has a more powerful engine and gets 4 mpg less than the 2016 E-Class Coupe. And finally, you'll seat two more passengers in the E-Class Coupe than in the RS 5 Coupe. Among similarities are the body structure, market segment, ground shadow size, and height.