Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the modifications, starting price, horsepower, and fuel economy. First of all, the 2016 Audi S8 is priced $107,100 lower compared to the base MSRP of the 2015 Mercedes-Benz S-Class Sedan S 65 AMG. Also, the 2015 S-Class Sedan S 65 AMG has bigger and thirstier engine; the 2016 S8 gets 3 more mpg. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.