I have Reference One mono block, upgraded from CA339. For musicality, I prefer the 339 since it uses 274B as tube rectifier. I like the Reference simply the power, the three dimensionality (as HP made comment on Western Electric W97A, made by Canary), the sheer naturalness, finese and delicacy for the highs. Obviously, The finese comes out single-end 300B is better. But with 8x300B tubes per channel, it is hard to beat.
