Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2018 Mercedes-Benz SL-Class SL 63 AMG, which is $83,250 less than the base MSRP of the 2018 Bentley Continental. Also, the 2018 Continental has bigger and thirstier engine; the 2018 SL-Class SL 63 AMG gets 4 more mpg. In addition, the Continental is both slightly larger and taller than the SL-Class SL 63 AMG. And then, you'll seat two more passengers in the Bentley Continental than in the Mercedes-Benz SL-Class SL 63 AMG. Among similarities are the body structure and market segment.