Ok Tom - here are some pictures of my ACG 332 for comparison. My lighting isn't very good so some details are hard to see - except of course for the dust! Sheesh (its been sitting on a shelf is my excuse). I think it's clear that many of the boiler details in the casting are crisper in your loco so there likely are new molds. It doesn't seem to me on a quick comparison that other details were added to the new molds. A sharper eye than mine might dispute that.
Similar to my somewhat bemused 'grousing' about the EP-5 electrics being offered by Flyonel in RR names/colors for which there are no prototypes (other than New Haven), Gilbert's Northern was a pretty good model of the UP FEF (which I think was the last set of steam engines bought by UP). Other RRs had 4-8-4s, of course, but they differed from the UP version...
- Rich