Radiohead, I have experience with the Evolution cables but not with the Stereovox, so I can't directly answer your question. However, FWIW, I found the Evolution cables improved significantly on the performance of the Jena Labs Symphony speaker cables that I had previously been using. The Evolution cables have significantly more bass weight, dynamics and authority.
If you do go with the Evolution cables, you need to allow them to burn in for a very long period before critically judging them. The high frequencies will likely strike you as assertive initially, but the cables ultimately develop sweet, refined highs as they burn in over the course of about 1,000 hours.
If you do go with the Evolution cables, you need to allow them to burn in for a very long period before critically judging them. The high frequencies will likely strike you as assertive initially, but the cables ultimately develop sweet, refined highs as they burn in over the course of about 1,000 hours.