Two Pickups with some similarities, but otherwise different in most aspects such as the model year, starting price, and horsepower. First of all, there is a notable difference in the starting price of the 2017 Chevrolet Silverado 2500HD Regular Cab, which is $4,610 less than the base MSRP of the 2013 Ram 2500 Mega Cab, which is four model years older. And finally, the 2017 Silverado 2500HD Regular Cab produces fewer horsepower than the 2013 2500 Mega Cab. Among similarities are the body structure and maximum occupancy.