I think you should email Purist dealer Albert Porter on this site. I'm sure he can answer your question. Very responsive person. BTW, I have recent experience with both the Venusta and Neptune and they are both great cables at their price points.
Purist interconnect cables
It appears that the PAD Proteus Rev B was not kept in he PAD line for very long; were there issues with this cable? How does it compare to the new Venustas line, which is actually cheaper than the original Proteus Rev B?