Two Convertibles with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2016 Mercedes-Benz E-Class Convertible, which is $16,950 less than the base MSRP of the 2015 Audi RS 5 Convertible. Also, the 2015 RS 5 Convertible has bigger and thirstier engine; the 2016 E-Class Convertible gets 3.5 more mpg. And finally, you'll seat two more passengers in the E-Class Convertible than in the RS 5 Convertible. Among similarities are the body structure, market segment, ground shadow size, and height.