Mapleshade Single VS Double Helix Speaker Cable

Does anyone have direct experience with the actual sonic differences between these cables?
I have a well worn pair of Single Helix now.

Also, anyone have experience with their outfitting banana connectors on them? I must have that to fit my new Exposure amp.

I prefer the double, feel it is well worth the cost, and I think the plus is also worthwhile. Not tried the bananas, but very good experiences with Mapleshade customer service.
The Double Helix is a big step up from their standard speaker cable. Keep in mind that connectors impart their own sound on the cable and it's not a consistent sound at that. It varies. It's what drives most folk mad.

All the best,