Two Sedans with more similarities, such as the body structure, market segment, height, and maximum occupancy, than differences, like the modifications, starting price, horsepower, fuel economy, and ground shadow size. First of all, there is a $108,700 difference in the base MSRP. The 2017 Bentley Mulsanne Speed has a higher starting price than the 2017 Mercedes-Benz S-Class Sedan AMG S 65. Also, the 2017 S-Class Sedan AMG S 65 has a more powerful engine than the 2017 Mulsanne Speed, but it gets 2.5 more miles on a gallon of fuel. In addition, the Mulsanne Speed is slightly larger than the S-Class Sedan AMG S 65. Among similarities are the body structure, market segment, height, and maximum occupancy.