Two SUVs with more similarities, such as the body structure, market segment, starting price, ground shadow size, and maximum occupancy, than differences, like the horsepower, fuel economy, and height. First of all, the 2016 BMW X1 has a more powerful engine and gets 3 mpg less than the 2016 Mercedes-Benz GLA-Class. And finally, the roofline of the 2016 X1 is slightly higher than the 2016 GLA-Class's. Among similarities are the body structure, market segment, starting price, ground shadow size, and maximum occupancy.