Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, model year, starting price, horsepower, and fuel economy. First of all, there is a $23,600 difference in the base MSRP. The 2014 Maserati GranTurismo Convertible Sport, an older vehicle by two model years, has a higher starting price than the 2016 BMW M6 Convertible. Also, a bigger engine usually means less mpg. But the 2016 M6 Convertible has a more powerful engine and it gets 1 more mpg than the 2014 GranTurismo Convertible Sport. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.