One hears the sound of Roon when using Innuos gear vs the Innuos Sense software. Roon sounds different vs Sense on Innuos gear. Obvious and easily heard with a resolving system.
My digital front end consists of: Innuos Zenith 3... - Tron Atlantic Signature dac.
But that is not a fair test. The Innuous software is developed to run and feed right to the DAC; it's far more lightweight than Roon. Roon drives your gear like a stock car driver and is very resource-heavy. Their solution is to isolate that by feeding the pure PCM stream over the network to a different endpoint that is doing nothing but streaming the data.
I understand you can A/B Roon on these single server/streamer combo units. What I'm saying is that since it's not the way Roon recommends using their software, if you want a fair scientific comparison, you gotta stream to a separate, very quiet endpoint.
It might still sound worse. But that's the fair test.