I've finally had a chance to get (re)aquatinted with both. Long story short, B-wham wins (in Classic mode, even). I haven't tried everything with the H9 yet, mostly just harmonies, and for me the real test is the v4 mode, when I want an instant 5-string. The B-wham does a satisfying job in Classic mode (I can definitely hear the difference between it and Chords especially on this setting) and from what I remember, haven't remade the setting yet, the H9 wasn't nearly as "real" sounding.