Two SUVs with more similarities, such as the body structure, ground shadow size, height, and maximum occupancy, than differences, like the fuel economy, starting price, and horsepower. First of all, the 2015 GMC Terrain is priced $4,300 lower compared to the base MSRP of the 2016 Toyota RAV4 Hybrid. And finally, a bigger engine usually means less mpg. But the 2016 RAV4 Hybrid has a more powerful engine and it gets 7.5 more mpg than the 2015 Terrain. Among similarities are the body structure, ground shadow size, height, and maximum occupancy.