Two Convertibles 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 $10,250 difference in the base MSRP. The 2015 BMW M4 Convertible has a higher starting price than the 2016 Mercedes-Benz E-Class Convertible. Also, the 2015 M4 Convertible has a more powerful engine and gets 1.5 mpg less than the 2016 E-Class Convertible. In addition, the roofline of the M4 Convertible is slightly lower than the E-Class Convertible's. And finally, the Mercedes-Benz E-Class Convertible seats two more passengers than the BMW M4 Convertible. Among similarities are the body structure, market segment, and ground shadow size.