Two Pickups with more similarities, such as the body structure, starting price, ground shadow size, height, and maximum occupancy, than differences, like the horsepower and fuel economy. And finally, the 2018 Toyota Tundra Double Cab has a more powerful engine and gets 4.5 mpg less than the 2018 Ram 1500 Quad Cab. Among similarities are the body structure, starting price, ground shadow size, height, and maximum occupancy.