Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, height, horsepower, ground shadow size, and maximum occupancy. First of all, the 2015 FIAT 500 Convertible C Abarth pulls more horsepower than the 2016 Mazda MX-5 Miata. Also, comparing the dimensions we see that the 2015 500 Convertible C Abarth is slightly smaller, although it's significantly taller than the 2016 MX-5 Miata. In addition, the 500 Convertible C Abarth seats two more passengers than the MX-5 Miata. Among similarities are the body structure, market segment, starting price, and fuel economy.