Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, the 2016 FIAT 500 Convertible C Abarth is priced $15,125 lower compared to the base MSRP of the 2016 Nissan 370Z Convertible. Also, the 2016 370Z Convertible has a more powerful engine than the 2016 500 Convertible C Abarth, and it gets 19.5 fewer miles on a gallon of fuel. In addition, although the 500 Convertible C Abarth is significantly smaller, it has a slightly taller body than the 370Z Convertible. And then, you'll seat two more passengers in the FIAT 500 Convertible C Abarth than in the Nissan 370Z Convertible. Among similarities are the body structure and market segment.