Two Coupes with some similarities, but otherwise different in most aspects such as the starting price, horsepower, model year, fuel economy, height, and maximum occupancy. First of all, the 2014 Mercedes-Benz C-Class Coupe is priced $14,400 lower compared to the base MSRP of the 2016 Porsche Cayman, which is newer by two model years. Also, the 2016 Cayman has a more powerful engine than the 2014 C-Class Coupe, and it gets 1.3 fewer miles on a gallon of fuel. In addition, the C-Class Coupe has a slightly taller body than the Cayman. And finally, you'll seat two more passengers in the Mercedes-Benz C-Class Coupe than in the Porsche Cayman. Among similarities are the body structure, market segment, and ground shadow size.