Im impressed that this thread is still active! Even r6 2020 stopped back in feb 2021. I have to say even though i sold my r6 years ago it was an impressive dap for the time mseb was a game changer. Too bad the oi was oddly very high causing sensitive iems to sound muddy.
I have a few daps( sr15, r3 pro, r5, fiio x7) and there is something that the R6 does that sounds nicer to my ears. Not sure I could tell you what that is though