For anyone curious, this is what their specific basis looks like:
I'm not surprised the characters' wheels were not actually connected in Nitrogen Studios' render; It's a bit difficult to see where the axles connect. Also, the yarding mechanism that would normally be at the front (as in the photo above) was moved to the back of the cab (most likely due to the face[s]). The cab itself is open, whereas B&D have enclosed cabs.
I'm not surprised the characters' wheels were not actually connected in Nitrogen Studios' render; It's a bit difficult to see where the axles connect. Also, the yarding mechanism that would normally be at the front (as in the photo above) was moved to the back of the cab (most likely due to the face[s]). The cab itself is open, whereas B&D have enclosed cabs.