Have used both with Harbeth. I preferred Auditorium. They both have a similar tonal balance, but the auditorium is more refined, especially in the highs.
note I was using tubes. With SS, both came off as too lean for my tastes. Went with Acoustic Zen and all is well.
note I was using tubes. With SS, both came off as too lean for my tastes. Went with Acoustic Zen and all is well.