Two Coupes 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, there is a notable difference in the starting price of the 2015 Audi R8 Coupe, which is $69,000 less than the base MSRP of the 2016 Porsche 911 Coupe R. Also, the 2015 R8 Coupe pulls more horsepower than the 2016 911 Coupe R. Among similarities are the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy.