Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, fuel economy, ground shadow size, and height. First of all, there is a $219,200 difference in the base MSRP. The 2018 Bentley Continental GT Supersports has a higher starting price than the 2018 Porsche 911 Convertible. Also, the 2018 Continental GT Supersports has a more powerful engine and gets 8.5 mpg less than the 2018 911 Convertible. In addition, the Continental GT Supersports is both slightly larger and taller than the 911 Convertible. Among similarities are the body structure, market segment, and maximum occupancy.