Two Pickups with some similarities, but otherwise different in most aspects such as the horsepower, starting price, fuel economy, ground shadow size, height, and maximum occupancy. First of all, the 2018 Toyota Tacoma Double Cab is priced $3,750 lower compared to the base MSRP of the 2018 Nissan Titan Regular Cab. Also, the 2018 Titan Regular Cab has a more powerful engine and gets 1.6 mpg less than the 2018 Tacoma Double Cab. In addition, the Titan Regular Cab body is slightly larger than the Tacoma Double Cab, and in addition to that, it's also taller. And finally, you'll seat one more passenger in the Nissan Titan Regular Cab than in the Toyota Tacoma Double Cab. Among similarities is the body structure.