I also haven't heard the E10, but had the E11 (sound sig. is not very different according to E10 vs E11 reviews), and did have the CMoyBB for a while as well. The E11 has a very clean, clear sound, but might be considered "cold" by some as it did not add any bass or mid warmth. It clarified everything making it a bit dry sounding, which is great if you want a very clear analytical sound.
The CMoyBB is a warmer, more musical sounding amp. The bass and mids sound a bit thicker and fuller on it, and while it was about as clear as the E11, the warmth added made you think "musical" rather than analytical.
Seems that these 2 amps should be thought of as different products: CMoyBB as an amp; E10 as a DAC (with amp capabilities).
Edited by kmhaynes - 12/6/11 at 7:44am