Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, ground shadow size, market segment, and fuel economy. First of all, there is a $37,000 difference in the base MSRP. The 2016 Mercedes-Benz SL-Class SL 63 AMG has a higher starting price than the 2015 Aston Martin V8 Vantage Convertible. Also, although the 2016 SL-Class SL 63 AMG has a more powerful engine than the 2015 V8 Vantage Convertible, it gets 3.5 more mpg. In addition, the body structure of V8 Vantage Convertible is significantly smaller than that of the SL-Class SL 63 AMG. Among similarities are the body structure, market segment, height, and maximum occupancy.