Two Coupes with more similarities, such as the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy, than differences, like the model year, modifications, horsepower, and fuel economy. First of all, a bigger engine usually means less mpg. But the 2016 S-Class Coupe S 63 AMG 4MATIC has a more powerful engine and it gets 1.5 more mpg than the 2013 Continental GT. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.