Two Pickups with some similarities, but otherwise different in most aspects such as the starting price, horsepower, height, and maximum occupancy. First of all, there is a $6,695 difference in the base MSRP. The 2017 GMC Sierra 2500HD Double Cab has a higher starting price than the 2017 Honda Ridgeline. Also, the 2017 Sierra 2500HD Double Cab pulls more horsepower than the 2017 Ridgeline. In addition, the Sierra 2500HD Double Cab has a slightly taller body than the Ridgeline. And finally, there is a difference in the number of passengers; the GMC Sierra 2500HD Double Cab seats one more the Honda Ridgeline. Among similarities is the body structure.