Here, @Norton, is the Lionel-Smithsonian Dreyfuss Hudson tender coupled up to the RPO in the set. You be the judge -
Personally, I think the 3rd Rail / GGD combo has a better color match. The other interesting thing in this picture is the presence of a mail crane. The model has four installed. The real car may have been delivered with them, but as far as I can tell they were never fitted in actual service. I don't think this train picked up mail enroute, and I've never seen a picture of a real Century RPO operating with mail cranes installed.
Now onto other business: I envy you that gunmetal CV 4-6-4. Great train, great model!
- Mike