Two Coupes with some similarities, but otherwise different in most aspects such as the model year, starting price, and horsepower. First of all, the 2015 Infiniti Q60 Coupe is priced $12,150 lower compared to the base MSRP of the 2017 Audi S5 Coupe, which is newer by two model years. And finally, the 2015 Q60 Coupe produces fewer horsepower than the 2017 S5 Coupe. Among similarities are the body structure, market segment, and fuel economy.