Two Coupes with more similarities, such as the body structure, market segment, starting price, ground shadow size, and maximum occupancy, than differences, like the horsepower, fuel economy, and height. First of all, the 2017 Maserati GranTurismo has a more powerful engine than the 2017 Mercedes-Benz S-Class Coupe, and it gets 4 fewer miles on a gallon of fuel. And finally, the 2017 GranTurismo is slightly shorter than the 2017 S-Class Coupe. Among similarities are the body structure, market segment, starting price, ground shadow size, and maximum occupancy.