Some things just work better than others for no obvious reason. I don’t mean “sound” I mean “work”.
Those Dragonfly DACs? They work. Very Reliable. Other equipment seems to like them. I have 3 different OTG cables to use with my cheap generic Android phablet. I can use any of them, plus UAPP (the USB app) and the Dragonfly. Go to TIDAL, and MQA works as reliably as beer creates pee.
With the iFi xDSD, it’s an iffy thing. Sometimes yes, sometimes no. Swap in, swap out. On everything else, the xDSD is bulletproof. On the Mac Mini? It’s works like Tequila, Salt, and Lime. But in the generic android chain? It has prostate problems. I think it likes the black generic ToGo cable better than the white Amazon one. And it seems OK (most of the time) with the USB-3 hub. Sometimes you need to restart. Sometimes you need to restart while reciting obscure sections of the Talmud.
But Dragonfly? Is agnostic.