CONFUSED: USB -- a "solved" problem, or back to SPDIF?

[Savolax]

For what it's worth, I own a Singxer SU-1 DDC which is modified to use SOtM sCLK-EX board and I had a chance to listen Schiit Bifrost 2 at home for a while.

I understand these are different products for different purpose and it might not make sense making arguments either way but I found signal qualities to be better with SU-1 sCLK-EX than using just USB input Bifrost 2 with XLR or RCA out to my Audio-GD NOS-11, in terms of cleaner sound (digital hash or whatever you would feel more appropriate).

 

By the time I made the comparison I had JCAT USB Femto as USB output. Powered with UpTone LPS-1.2.

SU-1 sCLK-EX was powered with Farad3 LPS. 

 

I guess my point here is that I did not experience any great revelation regarding Unison USB on Bifrost 2. Actually I felt Bifrost 2 performed better when input with AES from SU-1 sCLK-EX.

Based on this experience I would say Unison USB is far from perfected. I have no other experience with Schiit gear so I have no reference there how it has improved on USB.