I've had 2 V20s and I understand the quad DAC has remained the same. While they sounded good they didn't blow me away as the "best d*mned sounding phone around." I'm comparing the sound to my not-so-inexpensive OPPO and Cambridge Audio DACs and Burson headphone amps. Toys are fun.
I say that to say I'm a reasonable judge of headphone sound quality, based on varied experience. Unless the V30 sounds DRAMATICALLY better than the V20s I've had I remain skeptical that "Samsung devices cannot match or come close to the quad dac on the V30." Both handsets have DACs and the V30's quads are technically more precise. Whether or not that translates into better sound with the same content is something I'd like to hear.
That said, I'm always the first to admit that I may be mistaken.