Two Convertibles with more similarities, such as the body structure, market segment, and maximum occupancy, than differences, like the starting price, horsepower, ground shadow size, and height. First of all, there is a $9,910 difference in the base MSRP. The 2018 Nissan 370Z Convertible has a higher starting price than the 2018 Mazda MX-5 Miata RF. Also, the 2018 370Z Convertible has a more powerful engine than the 2018 MX-5 Miata RF. And finally, the MX-5 Miata RF body is significantly smaller than the 370Z Convertible, and in addition to that, it's also slightly shorter. Among similarities are the body structure, market segment, and maximum occupancy.