Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the market segment, starting price, horsepower, and fuel economy. First of all, there is a $13,400 difference in the base MSRP. The 2015 Audi S6 has a higher starting price than the 2016 BMW ActiveHybrid 5. Also, the 2015 S6 has a more powerful engine than the 2016 ActiveHybrid 5, and it gets 6 fewer miles on a gallon of fuel. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.