Two Sedans with more similarities, such as the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy, than differences, like the model year, powertrain, horsepower, and fuel economy. First of all, the 2016 Quattroporte has bigger and thirstier engine; the 2013 S-Class Diesel gets 7 more mpg. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.