Yes, I have compared both Black Mamabas to the Python Helix Alpha and Helix Vx and to the Python CX (along with Diamondbacks and others). The Black Mambas are both nice. I would take either of them over a Python Helix Alpha/Vx on a source, and probably on most amps as well. In the end, I found the Python CX well worth the additional cost for the far greater performance it offers over the Black Mamba HC or non-HC. To me, the CX series compared to the Helix series has a more refined sound with more dynamics and less upper-midrange glare.
