Two Pickups, but completely different in all significant aspects: model year, starting price, horsepower, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2018 GMC Canyon Extended Cab, which is $8,535 less than the base MSRP of the 2013 Ram 2500 Regular Cab, which is five model years older. Also, the 2018 Canyon Extended Cab produces fewer horsepower than the 2013 2500 Regular Cab. And finally, you'll seat one more passenger in the 2500 Regular Cab than in the Canyon Extended Cab. Among similarities is the body structure.