Two Pickups with more similarities, such as the body structure, height, and maximum occupancy, than differences, like the model year, starting price, and horsepower. First of all, there is a $10,955 difference in the base MSRP. The 2014 Ram 2500 Mega Cab, an older vehicle by three model years, has a higher starting price than the 2017 GMC Sierra 1500 Regular Cab. And finally, the 2017 Sierra 1500 Regular Cab produces fewer horsepower than the 2014 2500 Mega Cab. Among similarities are the body structure, height, and maximum occupancy.