Two Pickups with more similarities, such as the body structure, starting price, height, and maximum occupancy, than differences, like the horsepower and ground shadow size. First of all, the 2018 Chevrolet Silverado 2500HD Regular Cab pulls more horsepower than the 2018 Toyota Tundra Double Cab. And finally, the 2018 Silverado 2500HD Regular Cab is slightly smaller than the 2018 Tundra Double Cab. Among similarities are the body structure, starting price, height, and maximum occupancy.