Thanks all for sharing your experiences!
I have tested some more the last couple of days confirming my original assessment that it is overall very close; maybe some super minor advantages towards Qobuz but I could definitely live quite well with both formats.
I agree that having used the best original master and state-of-the-art mastering equipment is probably more important then the format.
[Christopher S. Johnson]
One minor quibble is that we can’t assume that Tidal MQA and Qobuz Hi-Res are starting from the same original digital master. I purchase High-res music all the time and regularly see labels, especially in Classical offering the same recording at 24/96, 24/192, and even DSD64, etc. So what was the original that Tidal MQA started from, and what was the original that Quobuz Hi-Res started from? Neither of them equal 24/192 in any case. And is either of them, then, still “lossless?”
Christopher, I think when you look at the new release pipeline of Tidal and Qobuz and both album copies are from the same label, issued during the same week and provided with the same original sampling rate, e.g., Qobuz 24bit/96khz vs. Tidal 24bit/48khz MQA 96khz you can be quite certain that it was the same master.