Two Sedans with some similarities, but otherwise different in most aspects such as the modifications, starting price, fuel economy, horsepower, and maximum occupancy. First of all, the 2017 Porsche Panamera is priced $60,500 lower compared to the base MSRP of the 2017 Maserati Quattroporte GTS GranSport. Also, the 2017 Quattroporte GTS GranSport has a more powerful engine and gets 5.6 mpg less than the 2017 Panamera. In addition, you'll seat one more passenger in the Quattroporte GTS GranSport than in the Panamera. Among similarities are the body structure, market segment, ground shadow size, and height.