What we have here are two Pickups from GMC with some differences, such as the horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, the 2016 GMC Sierra 1500 Regular Cab has a more powerful engine than the 2015 GMC Canyon Crew Cab, and it gets 1.5 fewer miles on a gallon of fuel. Also, the 2015 Canyon Crew Cab is both slightly smaller and shorter than the 2016 Sierra 1500 Regular Cab. And finally, there is a difference in the number of passengers; the Sierra 1500 Regular Cab seats one more the Canyon Crew Cab. Among similarities are the body structure and starting price.