Two Pickups with some similarities, but otherwise different in most aspects such as the model year, starting price, horsepower, ground shadow size, height, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2013 Nissan Frontier King Cab, which is $9,725 less than the base MSRP of the 2016 GMC Sierra 1500 Regular Cab, which is three model years newer. Also, the 2016 Sierra 1500 Regular Cab has a more powerful engine than the 2013 Frontier King Cab. In addition, the Sierra 1500 Regular Cab is both slightly larger and taller than the Frontier King Cab. And finally, you'll seat two more passengers in the GMC Sierra 1500 Regular Cab than in the Nissan Frontier King Cab. Among similarities are the body structure and fuel economy.