Two Coupes with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, height, and maximum occupancy. First of all, there is a $20,500 difference in the base MSRP. The 2016 Porsche Cayman has a higher starting price than the 2015 BMW 2 Series Coupe. Also, the 2016 Cayman has a more powerful engine and gets 5.5 mpg less than the 2015 2 Series Coupe. In addition, the roofline of the 2 Series Coupe is slightly higher than the Cayman's. And finally, you'll seat two more passengers in the BMW 2 Series Coupe than in the Porsche Cayman. Among similarities are the body structure, market segment, and ground shadow size.