The whizz bang Legacy sound and smoke always fetches more. I'm guessing yours may be the legacy version as the last 2 numbers are 12 14, sounds like the date of manufacture. These were offered in the 2013 volII catalog so that would make sense.
Having said that, if by some chance yours is the earlierTMCC version the level of detail is identical and Korean build quality probably better.
On top of that, if your gutting it. The TMCC loco has the proven Pittman can motor while the legacy version has a Canon motor.