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