The two pictures above of the WP and IC switchers do show the same lights on the end of the long hood. I think they're a prototypicalish size. It seems odd to me that they only come on when the cab end is leading. Maybe they're reverse lights in the real world? The effect is lost if the loco is pulling cars while running cab first.
The shell is not mounted the same way as the PW die cast frame switchers. Maybe it's held on by screws under the frame?
