Two Sedans with more similarities, such as the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy, than differences, like the modifications, model year, horsepower, and fuel economy. First of all, the 2016 CLS-Class AMG CLS 63 S 4MATIC has a more powerful engine and gets 1 mpg less than the 2014 RS 7. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.