Two Convertibles with some similarities, but otherwise different in most aspects such as the model year, starting price, horsepower, and fuel economy. First of all, there is an $18,600 difference in the base MSRP. The 2013 Maserati GranTurismo Convertible, an older vehicle by three model years, has a higher starting price than the 2016 BMW M6 Convertible. And finally, the 2016 M6 Convertible has a more powerful engine than the 2013 GranTurismo Convertible, 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.