I compared Roon and Audirvana a while back, but could not make out any difference. Tried hard, but nothing. I am not surprised as either app just sends 0/1s to DAC, just wanted to not-hear it for myself. I like Roon's interface a bit better, so use that.
From MacMini with SSD drive as dedicated Roon server via USB to Holoaudio May L2 DAC.