Audioquest Robin Hood silver or Audioquest Thunderbird zero?

I need new single-wire speaker cables (no bi-wiring for me) for my Luxman 509X amp. I am thinking of the Audioquest Thunderbird zero and the Robin Hood silver, which are in the same price range. However, I can not find many reviews on the Robin Hood silver cables. Anyone who can tell from his or her own experience what the differences are and what he or she does prefer? Thanks for your input.