Two Sedans with some similarities, but otherwise different in most aspects such as the modifications, maximum occupancy, model year, starting price, horsepower, and fuel economy. First of all, the 2016 Audi S7 is priced $16,870 lower compared to the base MSRP of the 2014 Mercedes-Benz E-Class Sedan E63 AMG 4MATIC S-Model, which is older by two model years. Also, the 2014 E-Class Sedan E63 AMG 4MATIC S-Model has a more powerful engine and gets 3 mpg less than the 2016 S7. In addition, you'll seat three more passengers in the E-Class Sedan E63 AMG 4MATIC S-Model than in the S7. Among similarities are the body structure, market segment, ground shadow size, and height.