It is weird, I will not say one is better than the other. It just depends on what your in the mood for or what fits best with your gear. Like I said, I really enjoyed the GPX R V2, it has it's strengths for sure and I will likely revisit it soon. In my system the Tunami GPX R-V2 kind of spreads things out, creates a lot of air and space plus provides a thicker heavier bass. The Black Mamba still images well, the stage is quite as wide or deep, but things are very focused and coherent. At first I thought the GPX R V2 was the warmer of the two, but I no longer think that is the case. Both are natural sounding and work well with most of the recordings. In other words, they don't sound brittle, bright, hard. I am very sensitive to that these days and if a cable exposes that in a recording at to high of a level, out it goes. Obviously, they can't fix crap recordings, but at least they are listenable.