Two SUVs with more similarities, such as the body structure, market segment, starting price, fuel economy, height, and maximum occupancy, than differences, like the model year, horsepower, and ground shadow size. First of all, there is a difference in model years. The is 3 years newer. Also, the 2013 X3 has a more powerful engine than the 2016 Discovery Sport. And finally, the X3 is slightly smaller than the Discovery Sport. Among similarities are the body structure, market segment, starting price, fuel economy, height, and maximum occupancy.