Two Pickups with more similarities, such as the body structure, starting price, height, and maximum occupancy, than differences, like the powertrain, horsepower, and ground shadow size. First of all, the 2016 Ram 1500 Quad Cab Diesel produces fewer horsepower than the 2015 Chevrolet Silverado 2500HD Double Cab. Also, the body structure of 2015 Silverado 2500HD Double Cab is slightly larger than that of the 2016 1500 Quad Cab Diesel. Among similarities are the body structure, starting price, height, and maximum occupancy.