My Vamp is a rebranded GoDAP which makes sense since V-Moda's forte is making headphones, not amps, and they can get a great head start by partnering with a quality amp manufacturer, then "V-Modatizing" them. I was skeptical regarding noticeable differences in sound with portable amps. Vamp is a game changer for me. I actually prefer the Pure mode to the VQ as the latter boosts the treble too much for my taste. With Pure mode, the EQ is perfection and I wouldn't change a thing, not even the bass. Mids are also more forward and detailed. Val wasn't kidding or overhyping when he mentioned how good of a synergy Vamp has with M-100. The pairing of the two is giving me goosebumps. Verza should do the same or more.