Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, and maximum occupancy, than differences, like the modifications, starting price, horsepower, fuel economy, and height. First of all, the 2016 BMW M6 Gran Coupe is priced $104,800 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 a more powerful engine and gets 1 mpg less than the 2016 M6 Gran Coupe. In addition, the roofline of the M6 Gran Coupe is slightly lower than the S-Class Sedan S 65 AMG's. Among similarities are the body structure, market segment, ground shadow size, and maximum occupancy.