Two Pickups with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2017 GMC Canyon Extended Cab, which is $9,615 less than the base MSRP of the 2017 Toyota Tundra Regular Cab. Also, the 2017 Tundra Regular Cab has bigger and thirstier engine; the 2017 Canyon Extended Cab gets 5.5 more mpg. In addition, the Canyon Extended Cab is both significantly smaller and slightly shorter than the Tundra Regular Cab. And finally, you'll seat one more passenger in the Toyota Tundra Regular Cab than in the GMC Canyon Extended Cab. Among similarities is the body structure.