Two Convertibles with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the model year, modifications, starting price, horsepower, and fuel economy. First of all, there is a $23,100 difference in the base MSRP. The 2013 Maserati GranTurismo Convertible Sport, an older vehicle by three model years, has a higher starting price than the 2016 BMW M6 Convertible. Also, the 2016 M6 Convertible has a more powerful engine than the 2013 GranTurismo Convertible Sport, but it gets 1 more mile on a gallon of fuel. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.