Two Pickups with some similarities, but otherwise different in most aspects such as the horsepower, starting price, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2017 GMC Canyon Extended Cab, which is $5,610 less than the base MSRP of the 2017 Ram 1500 Regular Cab. Also, the 2017 1500 Regular Cab has a more powerful engine than the 2017 Canyon Extended Cab, and it gets 1.9 fewer miles on a gallon of fuel. In addition, not only Canyon Extended Cab is slightly smaller, but it's also shorter than the 1500 Regular Cab. And finally, you'll seat one more passenger in the Ram 1500 Regular Cab than in the GMC Canyon Extended Cab. Among similarities is the body structure.