It would be good to clarify what is meant by 'can't hear a difference'. Can't hear a difference between what and what? 7.1.1 and 8.0 would the most relevant comparison. I guess
A better/more topical question might have been: "Which version of the firmware do you like best: 7.1.1, 7.1.3, 8.0, other"
A better/more topical question might have been: "Which version of the firmware do you like best: 7.1.1, 7.1.3, 8.0, other"
IMac macOS 10.15.3 (no link to Devialet ) / MacBook Pro Retina OS X 10.14.4 / Linn LP12 / Devialet 200 / Wilson Benesch Discovery.
Qobuz Desktop Latest Version / Audirvana 3.2.18 / Audirvana Remote / iTunes 12.9 / AIR 3.0.4 / Wi-Fi / FW 8.1.0 / SAM 50%
Cambridge, UK (Updated 27th February, 2020)