Two Convertibles with more similarities, such as the body structure, market segment, starting price, height, and maximum occupancy, than differences, like the modifications, horsepower, fuel economy, and ground shadow size. First of all, a bigger engine usually means less mpg. But the 2015 Mercedes-Benz SLK-Class SLK 55 AMG has a more powerful engine and it gets 2 more mpg than the 2016 Jaguar F-TYPE Convertible. Also, the 2016 F-TYPE Convertible is slightly larger than the 2015 SLK-Class SLK 55 AMG. Among similarities are the body structure, market segment, starting price, height, and maximum occupancy.