Two Pickups with more similarities, such as the body structure, fuel economy, and height, than differences, like the horsepower, starting price, ground shadow size, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2018 Toyota Tacoma Double Cab, which is $2,675 less than the base MSRP of the 2018 GMC Sierra 1500 Regular Cab. Also, the 2018 Sierra 1500 Regular Cab pulls more horsepower than the 2018 Tacoma Double Cab. In addition, the body structure of Sierra 1500 Regular Cab is slightly larger than that of the Tacoma Double Cab. And finally, you'll seat one more passenger in the GMC Sierra 1500 Regular Cab than in the Toyota Tacoma Double Cab. Among similarities are the body structure, fuel economy, and height.