Two Pickups, but completely different in all significant aspects: model year, starting price, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is a $3,075 difference in the base MSRP. The 2014 GMC Sierra 1500 Regular Cab, an older vehicle by two model years, has a higher starting price than the 2016 Nissan Frontier Crew Cab. Also, a bigger engine usually means less mpg. But the 2014 Sierra 1500 Regular Cab has a more powerful engine and it gets 1.5 more mpg than the 2016 Frontier Crew Cab. In addition, the Sierra 1500 Regular Cab body is slightly larger than the Frontier Crew Cab, and in addition to that, it's also taller. And finally, the GMC Sierra 1500 Regular Cab seats one more passenger than the Nissan Frontier Crew Cab. Among similarities is the body structure.