Two SUVs with more similarities, such as the body structure, starting price, horsepower, ground shadow size, height, and maximum occupancy, than differences, like the fuel economy. And finally, the 2016 GMC Acadia is more fuel efficient; it gets 1.5 more mpg than the 2015 Chevrolet Traverse. Among similarities are the body structure, starting price, horsepower, ground shadow size, height, and maximum occupancy.