Two Coupes with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, fuel economy, and height. First of all, there is a notable difference in the starting price of the 2017 Maserati GranTurismo, which is $31,925 less than the base MSRP of the 2017 Mercedes-Benz S-Class Coupe AMG S 63 4MATIC. Also, the 2017 S-Class Coupe AMG S 63 4MATIC has a more powerful engine than the 2017 GranTurismo, but it gets 2 more miles on a gallon of fuel. In addition, the GranTurismo is slightly shorter than the S-Class Coupe AMG S 63 4MATIC. Among similarities are the body structure, market segment, ground shadow size, and maximum occupancy.