Two Convertibles with some similarities, but otherwise different in most aspects such as the model year, modifications, starting price, fuel economy, horsepower, ground shadow size, and height. First of all, there is a notable difference in the starting price of the 2016 Porsche 911 Convertible, which is $46,600 less than the base MSRP of the 2013 Maserati GranTurismo Convertible Sport, which is three model years older. Also, a bigger engine usually means less mpg. But the 2016 911 Convertible has a more powerful engine and it gets 6 more mpg than the 2013 GranTurismo Convertible Sport. In addition, not only GranTurismo Convertible Sport is slightly larger, but it's also taller than the 911 Convertible. Among similarities are the body structure, market segment, and maximum occupancy.