Two Pickups with more similarities, such as the body structure, starting price, ground shadow size, height, and maximum occupancy, than differences, like the fuel economy and horsepower. And finally, the 2015 Nissan Titan King Cab has a more powerful engine than the 2016 GMC Sierra 1500 Regular Cab, and it gets 5 fewer miles on a gallon of fuel. Among similarities are the body structure, starting price, ground shadow size, height, and maximum occupancy.