Allegheny vs Blue Ridge

My understanding is the C&O 2-6-6-6 engine was an Allegheny and the Virginian 2-6-6-6 loco was a Blue Ridge. I don't think there were major differences in the engines themselves but I think there were some minor differerences. I think the sand domes were a spotting difference.

I read on a description of the Rivarossi HO model that the Blue Ridge had a larger tender with more capacity, but I couldn't find any details on how much of a difference.

The Virginain Railway is one of my favorite because it maintained a stable of the really large locomotives. The railroad serviced an coal mining territory in between the C&O in the N&W. Their locomotives worked 2% grades so they had there own variation of the Erie Triplex, a variation of the Santa Fe 2-10-10-2, USRA 2-8-8-2s, and yes DUPLICATES of the C&O 2-6-6-6 Alleghany class. The C&O was the original customer of the Lima built 2-6-6-6 locomotive in 1941. Customs dictate the C&O got to name the new class which was dubbed the Alleghany after the mountain range it was to travel. The Virginian Railroad desperate for power during WWII ordered duplicates of the class from Lima in 1945. War time restrictions made the Virginian locomotives some of the heaviest as well as limiting design changes. As the C&O and the Virginian were rivals, the Virginian would not stand to call their premier engines Alleghanys so they named them Blue Ridges after the mountains their railroad traveled. I'm not sure what changes were made after the Locomotives were delivered. Though Virginian was not known for having an engineering shop like N&W, UP, or ATSF that would tinker with the engines.

The Blue Ridge had smaller sand domes than the Allegheny. Also the water deck on the Blue Ridge's tender was higher than the Allegheny. Those were the principal spotting differences.

Ken