IME, the 1200 is just a bit crisper and "oomphier" than the 9.0 or 9.2, so if you didn't like those you probably won't like the 1200. The Mesa M6 and M9 Carbines can achieve a very similar sound, but have a bigger bottom and very flexible voicing presets. The thing I really like about the 1200 is the ability to mix the preamp channels and dial in whatever degree of preamp tube distortion you like and have it limited to the high-end, low-end, etc.
Ed Friedland used to do most/all of his older reviews through a GBE 1200/NEOX-212T pairing - check out his videos for a good taste.
Brian - Genz Benz Owner's Club #81 - 'Wick Club #221
Warwick Streamer Stage II/Spector NS-5H2-EX :: Genz Benz GBE 1200/Mesa M9 :: Genz Benz Uber 410/NEOX-212T