Two Pickups with more similarities, such as the body structure, starting price, fuel economy, ground shadow size, and maximum occupancy, than differences, like the horsepower and height. First of all, the 2016 Ram 1500 Quad Cab has a more powerful engine than the 2015 Chevrolet Silverado 1500 Double Cab. And finally, the 2015 Silverado 1500 Double Cab is slightly shorter than the 2016 1500 Quad Cab. Among similarities are the body structure, starting price, fuel economy, ground shadow size, and maximum occupancy.