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 2017 Toyota Tacoma Double Cab, which is $2,800 less than the base MSRP of the 2017 GMC Sierra 1500 Regular Cab. Also, the 2017 Sierra 1500 Regular Cab pulls more horsepower than the 2017 Tacoma Double Cab. In addition, the Sierra 1500 Regular Cab has a slightly larger body than the Tacoma Double Cab. And finally, there is a difference in the number of passengers; the GMC Sierra 1500 Regular Cab seats one more the Toyota Tacoma Double Cab. Among similarities are the body structure, fuel economy, and height.