For those thinking "That's a W900, isn't it?" there are actually three variants of the T800:
The W900 also has a couple of variants:
The T800H and the W900B look nearly identical. The only thing that visually sets them apart is the set-back axle on the T800 (All variants), compared to the set-forward axle on the W900 (all variants). The front axle is about 6 inches back, closer to the cabin on the T800 trucks compared to the W900. Normally it's a lot more obvious, but I have a flush bumper installed so it really is hard to tell at a glance.