Are there any HO scale kits out there of a true Norfolk Southern C40-9W either RTR or build it? Is there a conversion out there to convert C44-9W to a C40-9W?
I am not aware of any visual differences between the two models, all it takes is different software in the engine control computer. There might be minor differemces like you typically find between two companies buying the same model, but that is all.
The only visual distinction of the NS Dash 9’s is the fact that they are the only -9’s to have both the headlights and number boards above the windshield.