Two Convertibles with more similarities, such as the body structure, market segment, ground shadow size, and height, than differences, like the modifications, starting price, horsepower, fuel economy, and maximum occupancy. First of all, the 2016 Mercedes-Benz SL-Class SL 63 AMG is priced $32,309 lower compared to the base MSRP of the 2015 Maserati GranTurismo Convertible MC Centennial. Also, the 2016 SL-Class SL 63 AMG has a more powerful engine than the 2015 GranTurismo Convertible MC Centennial, but it gets 4 more miles on a gallon of fuel. In addition, the GranTurismo Convertible MC Centennial seats two more passengers than the SL-Class SL 63 AMG. Among similarities are the body structure, market segment, ground shadow size, and height.