Spotting Differences on E-9 vs E-8. All E-9's had the newer FAR-AIR vertial slit side grills like those found on F-9/FP-9 locomotives. Rubber gasket around headlight. Sand Box filler hatches had square corners,E-8's had rounded ones. These covers were interchangeable, On UP for example units could often be found after shopping with a mix of hatches. Some roads recieved locomotives from EMD with the model number on identifier plates below the cab windows on E and F units. Burlington was a good example of this. Union Pacific on the other hand did not always have these on their locomotives. First group of E-9's on UP lacked these plates and had duel headlights like E-8's. Later E-9's had single headlights and "E9" identifier plates. Nate Goodman (Nato).