Two Convertibles with more similarities, such as the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy, than differences, like the modifications, starting price, and horsepower. First of all, the 2017 BMW M6 Convertible is priced $111,800 lower compared to the base MSRP of the 2017 Bentley Continental Convertible GT V8 S. Also, the 2017 M6 Convertible has a more powerful engine than the 2017 Continental Convertible GT V8 S. Among similarities are the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy.