Two Sedans with some similarities, but otherwise different in most aspects such as the modifications, model year, horsepower, fuel economy, ground shadow size, and maximum occupancy. 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 S8. Also, the S8 has a slightly larger body than the CLS-Class AMG CLS 63 S 4MATIC. In addition, there is a difference in the number of passengers; the Audi S8 seats one more the Mercedes-Benz CLS-Class AMG CLS 63 S 4MATIC. Among similarities are the body structure, market segment, starting price, and height.