Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, fuel economy, height, horsepower, ground shadow size, and maximum occupancy. First of all, although the 2016 FIAT 500 Convertible C Abarth has a more powerful engine than the 2016 Mazda MX-5 Miata, it gets 10 more mpg. Also, comparing the dimensions we see that the 2016 500 Convertible C Abarth is slightly smaller, although it's significantly taller than the 2016 MX-5 Miata. In addition, you'll seat two more passengers in the 500 Convertible C Abarth than in the MX-5 Miata. Among similarities are the body structure, market segment, and starting price.