Two Convertibles with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, and ground shadow size. First of all, the 2016 Audi S5 Convertible is priced $84,640 lower compared to the base MSRP of the 2016 Maserati GranTurismo Convertible. Also, the 2016 GranTurismo Convertible has bigger and thirstier engine; the 2016 S5 Convertible gets 6 more mpg. And finally, the S5 Convertible has a slightly smaller body than the GranTurismo Convertible. Among similarities are the body structure, market segment, height, and maximum occupancy.