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 $4,515 difference in the base MSRP. The 2017 GMC Sierra 2500HD Regular Cab has a higher starting price than the 2017 Honda Ridgeline. Also, the 2017 Ridgeline produces fewer horsepower than the 2017 Sierra 2500HD Regular Cab. In addition, the Sierra 2500HD Regular Cab is slightly taller than the Ridgeline. And finally, you'll seat one more passenger in the GMC Sierra 2500HD Regular Cab than in the Honda Ridgeline. Among similarities is the body structure.