Two Pickups with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2015 Nissan Frontier Crew Cab, which is $5,015 less than the base MSRP of the 2016 GMC Sierra 1500 Regular Cab. Also, the 2016 Sierra 1500 Regular Cab has a more powerful engine than the 2015 Frontier Crew Cab, but it gets 1.5 more miles on a gallon of fuel. In addition, the Sierra 1500 Regular Cab is both slightly larger and taller than the Frontier Crew Cab. And finally, you'll seat one more passenger in the GMC Sierra 1500 Regular Cab than in the Nissan Frontier Crew Cab. Among similarities is the body structure.