Two Convertibles with some similarities, but otherwise different in most aspects such as the fuel economy, market segment, starting price, horsepower, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2016 Porsche 911 Convertible, which is $16,500 less than the base MSRP of the 2015 Aston Martin V8 Vantage Convertible. Also, the 2016 911 Convertible has a more powerful engine than the 2015 V8 Vantage Convertible, but it gets 5.5 more miles on a gallon of fuel. In addition, there is a difference in the number of passengers; the 911 Convertible seats two more the V8 Vantage Convertible. Among similarities are the body structure, market segment, ground shadow size, and height.