Two Coupes with more similarities, such as the body structure, market segment, starting price, ground shadow size, and maximum occupancy, than differences, like the modifications, horsepower, fuel economy, and height. First of all, a bigger engine usually means less mpg. But the 2016 Mercedes-Benz S-Class Coupe S 63 AMG 4MATIC has a more powerful engine and it gets 2 more mpg than the 2016 Maserati GranTurismo MC Centennial. Also, the 2016 GranTurismo MC Centennial has a slightly taller body than the 2016 S-Class Coupe S 63 AMG 4MATIC. Among similarities are the body structure, market segment, starting price, ground shadow size, and maximum occupancy.