IMHO, Bruce -
It is the same car, but modified later by being stretched a couple of feet and with
a four-wheel "lead truck" replacing the original two-wheel front axle for improved
tracking. Note that the front spring arrangement was retained, even after the single
axle was replaced by the two-axle truck, and that the rear spring and axle appear to
be identical in both photos.
- El Abuelo Histœrico, Greengo y Curmudgeoño de los Locomoturas Viejos y Verdes,
aka Der Grossväterlich DünkelOlivGrünDampfKesselMantelLiebHabender