Two Convertibles with more similarities, such as the body structure, market segment, height, and maximum occupancy, than differences, like the modifications, starting price, horsepower, fuel economy, and ground shadow size. First of all, there is a $120,909 difference in the base MSRP. The 2015 Maserati GranTurismo Convertible MC Centennial has a higher starting price than the 2016 Audi S5 Convertible. Also, the 2015 GranTurismo Convertible MC Centennial has a more powerful engine than the 2016 S5 Convertible, and it gets 6 fewer miles on a gallon of fuel. In addition, the S5 Convertible is slightly smaller than the GranTurismo Convertible MC Centennial. Among similarities are the body structure, market segment, height, and maximum occupancy.