What we have here are two Pickups from Toyota with some differences, such as the model year, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, the 2013 Tundra Regular Cab has bigger and thirstier engine; the 2016 Tacoma Access Cab gets 4 more mpg. Also, the Tacoma Access Cab is both slightly smaller and shorter than the Tundra Regular Cab. In addition, the Toyota Tundra Regular Cab seats two more passengers than the Toyota Tacoma Access Cab. Among similarities are the body structure and starting price.