Innuos Zen Mini Mk3 w/PSU |VS| Lumin U1 Mini

OK so only interested in a direct comparison of these two products that are both at ~$2100.00 not other options etc. etc. etc.  Yes I know the Innuos has a CD drive but ignore for the purposes of this discussion.  I have read pretty much everything available so I'm looking for experience with one or hopefully both units.
- output flexibility
- Output resolution
- Sound differences
- App comparison
- Overall experience 
Downstream DACs Holo-May-KTE and the SW1X Dac-II-Balanced (will feed the May via USB and the SW1X by Spdif
Preamplifier is the Don Sachs custom