Two SUVs with some similarities, but otherwise different in most aspects such as the model year, fuel economy, market segment, ground shadow size, and height. First of all, the is a newer vehicle by 3 model years. Also, you get 76 more mpg with the 2013 X5 M than with the 2016 Model X. In addition, comparing the dimensions we see that the X5 M is slightly smaller, although it's taller than the Model X. Among similarities are the body structure, market segment, starting price, and maximum occupancy.