Two Convertibles with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the modifications, starting price, horsepower, and fuel economy. First of all, there is a $41,370 difference in the base MSRP. The 2016 Maserati GranTurismo Convertible MC has a higher starting price than the 2016 BMW M6 Convertible. Also, although the 2016 M6 Convertible has a more powerful engine than the 2016 GranTurismo Convertible MC, it gets 1 more mpg. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.