Two Convertibles with some similarities, but otherwise different in most aspects such as the starting price, fuel economy, model year, horsepower, ground shadow size, and maximum occupancy. First of all, the 2014 Mercedes-Benz SL-Class is priced $39,040 lower compared to the base MSRP of the 2016 Maserati GranTurismo Convertible, which is newer by two model years. Also, the 2016 GranTurismo Convertible has bigger and thirstier engine; the 2014 SL-Class gets 5 more mpg. In addition, the body structure of GranTurismo Convertible is slightly larger than that of the SL-Class. And finally, you'll seat two more passengers in the Maserati GranTurismo Convertible than in the Mercedes-Benz SL-Class. Among similarities are the body structure, market segment, and height.