ozzy,
I have not previously read of one having and compared both. I do have the AudioSensibility Lumin DC cable, which I enjoy and have posted on, but no experience with the Westminster Lab one. I have a few other top line AudioSensibility cables such as XLR and power cable. While I have not found the OCC Silver to be harsh, in my experience they gain much more body and balance after multiple hours of use--recommend critical evaluating after at least 100+ hours of use. I hope the AS cable works out well for you.