Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, model year, horsepower, fuel economy, and ground shadow size. First of all, the 2016 F-TYPE Convertible R has bigger and thirstier engine; the 2014 SL-Class gets 2 more mpg. Also, the F-TYPE Convertible R has a slightly smaller body than the SL-Class. Among similarities are the body structure, market segment, starting price, height, and maximum occupancy.