Two Convertibles with some similarities, but otherwise different in most aspects such as the market segment, horsepower, ground shadow size, height, and maximum occupancy. First of all, the 2015 Aston Martin V8 Vantage Convertible produces fewer horsepower than the 2016 BMW M6 Convertible. Also, not only 2015 V8 Vantage Convertible is slightly smaller, but it's also shorter than the 2016 M6 Convertible. In addition, you'll seat two more passengers in the M6 Convertible than in the V8 Vantage Convertible. Among similarities are the body structure, market segment, starting price, and fuel economy.