Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, fuel economy, ground shadow size, starting price, horsepower, and height. First of all, there is a $6,370 difference in the base MSRP. The 2016 Buick Cascada has a higher starting price than the 2016 FIAT 500 Convertible C Abarth. Also, the 2016 Cascada has bigger and thirstier engine; the 2016 500 Convertible C Abarth gets 17 more mpg. In addition, the Cascada is significantly larger, but the roofline is slightly shorter than that of the 500 Convertible C Abarth. Among similarities are the body structure and maximum occupancy.