Still fiddling around with it, its currently on High gain. I don't know about that comparison but i have been reading on the net that the STX DAC is actually quite good, the DAC used in the Modi seems inferior on paper. I do know however that its not just the DAC chip that makes good/bad sound-quality, other components used definitely make it or break it as well. I have read several reviews/comments that it's not worth it going from the DAC on the STX to a Modi. I have even read that the DAC on the STX is better.