I would say 80%+ in a blind test is an easy win. Some argue that there must be 90%+ but they must know very little about human senses and perception. I have performed blind tests many times from wine to chocolate to coffee to music. It’s sometimes impossible to notice the difference between a good Champagne and a nice Italian Prosecco after six or seven sips. Both are good in their own right but I can easily taste the difference if you just give me one of them. So even though perception messes with your head after a couple of switches in a blind environment, we came out with a clear winner.
Also: My Mac mini is modified, runs only the bare minimum of things and has a linear power supply from UpTone Audio. When moving the Mac mini away from the source I believe it sounds the best. But for the sake of a good A/B test we had the computer next to the rest of the equipment.