Two Sedans with more similarities, such as the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy, than differences, like the modifications, starting price, and horsepower. First of all, there is an $8,400 difference in the base MSRP. The 2015 Mercedes-Benz C-Class Sedan AMG C 63 S has a higher starting price than the 2016 BMW M3. Also, the 2016 M3 produces fewer horsepower than the 2015 C-Class Sedan AMG C 63 S. Among similarities are the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy.