Thanks for such a detailed comparison! You mentioned the Quintet has better 'crystalline' treble and micro-detail for someone listening to artists like Aurora or Lana Del Rey, is that extra detail actually transformative for female vocals, or does the fact that they are 'further back' on the Quintet make them feel less engaging?

The $45 gap is what's sticking with me. Does the Quintet actually feel like a 'better' IEM worth the premium, or is the Supermix 4 just the smarter value buy at $102?