Here's my take midway though today If the choices were only default and alt1, I would have mine set at Default/Default. I thought alt1 was too polite for my system and years. I switched alt1 from switch to router and returned Default to switch The sound was better but not to my liking
It was lacking detail, and layering and yes you could convince me that it was burn in and I was being premature. Indeed...I agree
Yet, I was eager to hear what Alt2 brought to the table. And so I made the decision to halt early my alt1 experience before burn in. It was my thought that if Alt2 sounded off then indeed burn in would be high on the list of what's needed BUT, if it sounded better, that would be encouraging.
It took but a few minutes to make the cable and filter switch. I decided to leave alt2 in my router for no other reason than alt 1 was there now and it would give a quick comparison between the 2.
Well I have to say, it was nothing short of being gobsmacked as suddenly with XDMS, everything that I heard on default/default, I was hearing but with more of it. I played my short 6 file demo list and with virtually no burn in it sounded better than anything I have heard to date, except to say I thought it to e slightly veiled, and this only became apparent after I switched from XDMS to Roon. Roon had all of the attributes of what I was hearing with XDMS but absent the veil. It had a very detailed but open sound. The detail heard was what I search for and this quickly acme the spot I preferred, because Alt2 in switch just fell short of how it sounded the switch.
So not the best way I can describe my thoughts is that Default is a very neutral sound
Alt 1 seems to be less than Default when in comes to detail and emotion, and drawing me in
Alt 2 is default on some steroids , at least for my ears and my system. I have no idea if others will come to the same conclusion but for my ears, room and all tube system , Alt2 in Router and default in Switch seems to be where this squirrel has found the nut.
So for now at least this is where I intend to focus my listening efforts. In fact had I not switched to Roon I would be eternally happy with XDMS
My second favorite setting is default/ Default
YMMV