Two Coupes with some similarities, but otherwise different in most aspects such as the starting price, fuel economy, market segment, horsepower, and maximum occupancy. First of all, there is a $96,795 difference in the base MSRP. The 2017 Aston Martin V12 Vantage S Coupe has a higher starting price than the 2017 Porsche 911 Coupe. Also, the 2017 V12 Vantage S Coupe has a more powerful engine than the 2017 911 Coupe, and it gets 9 fewer miles on a gallon of fuel. In addition, you'll seat two more passengers in the 911 Coupe than in the V12 Vantage S Coupe. Among similarities are the body structure, market segment, ground shadow size, and height.