Two Convertibles with some similarities, but otherwise different in most aspects such as the horsepower, ground shadow size, starting price, fuel economy, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2015 smart fortwo Convertible, which is $2,465 less than the base MSRP of the 2016 FIAT 500 Convertible. Also, the 2016 500 Convertible has bigger and thirstier engine; the 2015 fortwo Convertible gets 2 more mpg. In addition, the 500 Convertible is significantly larger than the fortwo Convertible. And finally, there is a difference in the number of passengers; the FIAT 500 Convertible seats two more the smart fortwo Convertible. Among similarities are the body structure and height.