Agreed. During my short audition of the XBA-3 (I returned them), here's my impression between the XBA-3 and the MH1C:
XBA 3 has a more forward and less dark midrange but is also quite relaxing. The bass is punchier/tighter, but the MH1C has similar bass. I think the MH1C has better sub-bass/rumble. The major downside to the XBA-3 was the unnatural treble. High-hats and cymbals sounded "tinny," and there's no sparkle - it just kind of "fizzes" out. For me, the MH1C sounds more natural (many say the XBA series sounds a bit metallic), so I kept the MH1C.
I agree with this. The rather metallic and unnatural treble of the XBA3 is particularly apparent when I listen to string quartets(since I'm very familiar with how violins, violas and cellos should sound). It's a good IEM, but I tend to prefer the MH1c, since the sonic flaws of the MH1c are easily EQed away, wheras the flaws of the XBA3 are more difficult to remove.