Two Coupes with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the horsepower, starting price, and fuel economy. First of all, there is a $9,300 difference in the base MSRP. The 2015 Lexus RC F has a higher starting price than the 2016 Audi S5 Coupe. And finally, the 2015 RC F has a more powerful engine than the 2016 S5 Coupe, and it gets 1.5 fewer miles on a gallon of fuel. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.