Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, fuel economy, ground shadow size, and height. First of all, the 2017 Mercedes-Benz C-Class Convertible AMG C 63 is priced $72,890 lower compared to the base MSRP of the 2017 Maserati GranTurismo Convertible. Also, although the 2017 C-Class Convertible AMG C 63 has a more powerful engine than the 2017 GranTurismo Convertible, it gets 4 more mpg. In addition, although the GranTurismo Convertible is slightly larger, it has a shorter body than the C-Class Convertible AMG C 63. Among similarities are the body structure, market segment, and maximum occupancy.