Two Convertibles with some similarities, but otherwise different in most aspects such as the horsepower, ground shadow size, height, starting price, fuel economy, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2016 FIAT 500 Convertible, which is $4,520 less than the base MSRP of the 2016 Mazda MX-5 Miata. Also, the 2016 MX-5 Miata has a more powerful engine and gets 4 mpg less than the 2016 500 Convertible. In addition, although the 500 Convertible is significantly smaller, it has a taller body than the MX-5 Miata. And finally, there is a difference in the number of passengers; the FIAT 500 Convertible seats two more the Mazda MX-5 Miata. Among similarities is the body structure.