The front of both depots looks identical. The main difference would be the left rear of the building in the original photo I posted. It looks like there is a roof extending behind the building on the left side. If it is, that would be the NKP side of the Linden depot, which the Mitchell depot doesn't have. It's also possible that the original photo faintly shows the NKP track on both sides of the photo behind the depot..
George L.