I'm using the micro iCAN as amp for my Bifrost Uber DAC for my local music box (a Gustard U12 USB interface is feeding my Bifrost Uber over optical toslink, from my Daphile server).
The iDSD on Standard and Minimum phase filter setting sounds pretty similar to my Bifrost Uber stack. Only difference is if the iDSD runs on "Bit-perfect" filter setting, with this you can hear the difference between iDSD and Bifrost Uber. Whithin "Bit-perfect" filter the iDSD is almost "acting" like real R2R / Multibit DACs, the highs roll off on top end and a "smoother" tone in gernal (but still no real R2R / Multibit, but a good mix of both worlds to my ears), which I prefer for classic music listening (PCM format, in my case 16/44 FLAC files only). You get an incremental boost for clarity and soundstage, but it lacks slighty with the resolution. Bass and mids keeping great (a nuance more focus on I would say), but as said the highs rolling bit early off (normal for 16bit PCM in this case). For all other genres I prefer typical delta sigma (AKM DAC from Bifrost Uber) and iDSD on Minimum phase filter setting. Because my baby STAX SR-002 IEMs needs more weight on the highs on top end, like on typical R2R / Multibit the highs roll off don't match well in this case. I hope this helps.