The two photos show up the chimney and its problems and the ugly white headlight "glass".
Even if the factory fitted a "whiter" glass than intended, fitting anything other than clear was a really bad idea and I can't imagine what they were thinking of.....
3265 appears to match the red of a Tuscan and Russet FS or BS, so one of them is the wrong colour. Unless it is a photographic artefact, 3265 doesn't look like that in any light I've seen it under. I note that it has Ross "pop" safety valves, so it is a model of the preserved 3265. Is there a 1930s version as well?
The headlight on the black loco is pointing upward. Can this be just bent back into place or is it more complicated than that?
Did James select a loco with a six wheel tender, which would be rare on a superheated engine in the country? A few had it for turning at Campbelltown, but these wouldn't have made into the bush often...
The feed pipes do look odd. It matches the preserved 3265, but rather spoils the others.
Clearly what could have been a really good model is just another model spoiled by avoidable errors.
To return to the cabs and side overhang, the photo of P 509 in the NSWGR Centenary book shows the original cab very clearly, and the original running plate referred to by CraigW.
P 509 is of course a saturated engine. I remember that at the right angle, the weld where the additional frame plates were added to support the extended smokebox was visible. No sign of that on the model...