Two Coupes with some similarities, but otherwise different in most aspects such as the horsepower, ground shadow size, height, and maximum occupancy. First of all, the 2016 Porsche Cayman produces fewer horsepower than the 2015 Mercedes-Benz E-Class Coupe. Also, the 2015 E-Class Coupe is both slightly larger and taller than the 2016 Cayman. And finally, there is a difference in the number of passengers; the E-Class Coupe seats two more the Cayman. Among similarities are the body structure, market segment, starting price, and fuel economy.