Two SUVs with more similarities, such as the body structure, market segment, starting price, ground shadow size, and maximum occupancy, than differences, like the model year, horsepower, fuel economy, and height. First of all, the 2014 MKX has bigger and thirstier engine; the 2016 GLC-Class gets 4 more mpg. Also, the roofline of the MKX is slightly higher than the GLC-Class's. Among similarities are the body structure, market segment, starting price, ground shadow size, and maximum occupancy.