Although there are some similarities, these two are different in most aspects such as body structure, maximum occupancy, starting price, horsepower, and ground shadow size. First of all, there is a significant difference between body structures and exterior dimensions. The 2016 GMC Canyon Crew Cab is a Pickup, while the 2015 Ram Promaster Cargo is a Van. It is also slightly smaller. Also, there is a $3,105 difference in the base MSRP. The 2015 Promaster Cargo Van has a higher starting price than the 2016 Canyon Crew Cab. In addition, the Promaster Cargo Van pulls more horsepower than the Canyon Crew Cab. And finally, there is a difference in the number of passengers; the GMC Canyon Crew Cab seats three more the Ram Promaster Cargo Van.