Two SUVs with more similarities, such as the body structure, ground shadow size, and maximum occupancy, than differences, like the starting price, horsepower, fuel economy, and height. First of all, the 2016 FIAT 500X is priced $12,500 lower compared to the base MSRP of the 2016 Mercedes-Benz GLA-Class. Also, although the 2016 GLA-Class has a more powerful engine than the 2016 500X, it gets 2.4 more mpg. And finally, the 500X has a slightly taller body than the GLA-Class. Among similarities are the body structure, ground shadow size, and maximum occupancy.