Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the starting price, horsepower, and fuel economy. First of all, there is a $15,000 difference in the base MSRP. The 2015 Audi S8 has a higher starting price than the 2016 Maserati Quattroporte. And finally, although the 2015 S8 has a more powerful engine than the 2016 Quattroporte, it gets 2 more mpg. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.