Phronesis
Headphoneus Supremus
First off is the treble situation. Now this is very subjective but having heard the Hugo2 at length I can see what Vlad is talking about, and while I appreciate detail pace and resolution of the Hugo2 it can be a bit too much on some genres of music with a headphone that also lilts towards treble. Not everybody listens to carefully prepared audiophile recordings, and the Hugo2 can be ruthless with less than perfect productions. When you want to kick back and chill to your favourite album this is probably what a lot of people don’t want.
We should be clear that the Hugo 2 has been measured to show an essentially flat frequency response. We don't have guess whether or not there's more treble. If there's a perception of increased treble, that may reflect the Hugo 2 revealing, through increase detail or whatever, a headphone which is too bright, with that brightness being less apparent with other DACs.