No war necessary....just trust your ears. I currently still have a USB cable running from my headless/modified Mac Mini to the USB input of the K-03. When I took the Bel Canto RefLink on a 30 day trial, I purchased a second USB cable for an A/B comparison. Used of course the same quality USB Cable (Audioquest Carbon USB).
So my available connections where:
Mac Mini > Esoteric Async USB input via Audioquest Carbon USB Cable
and
Mac Mini > Bel Canto USB Converter via Audioquest Carbon USB cable > Transparent Ref (75 Ohm) Digital link out of Converter (Using BNC Adapter) to Coaxial input on K-03.
Using the same quality USB Cable for accurate comparison, as Jon2020 stated, the USB Converter provided an improvement in Micro/Macro Dynamics, greater detail recovery and just sounded better/right overall. Though the improvement was not overwhelming, it for me was an improvement worth the cost of $1,500 I paid for the Bel Canto. Some might define what I heard as reducing further the digital artifacts that are normally associated with digital playback.
Mark