Two Pickups with more similarities, such as the body structure, starting price, ground shadow size, and maximum occupancy, than differences, like the model year, horsepower, and height. First of all, the 2014 Silverado 2500HD Regular Cab has a more powerful engine than the 2016 Sierra 1500 Regular Cab. Also, the roofline of the Silverado 2500HD Regular Cab is slightly higher than the Sierra 1500 Regular Cab's. Among similarities are the body structure, starting price, ground shadow size, and maximum occupancy.