Just what it says: the GP38-2 has a functioning EOTD display - and very useful it is - and the AC4400 has a not-quite-so-useful one in the IFD screen: but the box in the C40-8W is inert, displaying nothing. Back-end BP pressure and acceleration would be really, really useful with long, heavy trains.
Urk! You're right. But that in the C40-8W is dead as a doornail, with all fuses on. Will edit the thread.
As an aside: in Clinchfield, there is of course no EOTD, but you can still get back-end brake pipe pressure by flying the 3 camera into the caboose and leaving it focused on the brakeman's gauge on the inner cupola wall. (This represents an abstracted reality, since there would be a live brakeman back there radioing readings to the engineer)