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, a bigger engine usually means less mpg. But the 2018 Nissan Titan Crew Cab has a more powerful engine and it gets 2.5 more mpg than the 2018 Toyota Tundra CrewMax Cab. Among similarities are the body structure, starting price, ground shadow size, height, and maximum occupancy.