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 2017 Nissan Titan Regular Cab has a more powerful engine and it gets 3 more mpg than the 2017 Toyota Tundra Regular Cab. Among similarities are the body structure, starting price, ground shadow size, height, and maximum occupancy.