Two SUVs, but completely different in all significant aspects: model year, starting price, maximum occupancy, horsepower, fuel economy, ground shadow size, and height. First of all, the 2013 GMC Yukon is priced $18,840 lower compared to the base MSRP of the 2016 BMW X6, which is newer by three model years. Also, the 2016 X6 has a more powerful engine than the 2013 Yukon, but it gets 3.3 more miles on a gallon of fuel. In addition, not only X6 is slightly smaller, but it's also shorter than the Yukon. And finally, the GMC Yukon seats three more passengers than the BMW X6. Among similarities are the body structure and market segment.