Two Convertibles with more similarities, such as the body structure, market segment, fuel economy, height, and maximum occupancy, than differences, like the starting price, horsepower, and ground shadow size. First of all, the 2016 Audi S5 Convertible is priced $22,500 lower compared to the base MSRP of the 2015 BMW 6 Series Convertible. Also, the 2015 6 Series Convertible pulls more horsepower than the 2016 S5 Convertible. And finally, the S5 Convertible has a slightly smaller body than the 6 Series Convertible. Among similarities are the body structure, market segment, fuel economy, height, and maximum occupancy.