I use both services with my Aurender W20se. I find that they both sound great, as a general rule. Some songs sound better on Tidal others on Qobuz. I like some of the features better on Tidal, particularly the "My Mix" playlists which I use to discover new music. The AI probably isn't as good as Spotify for sourcing "similar" music but I have yet to identify that feature on Qobuz. Qobuz seems pretty basic and I don't like the way they sort their music as much as Tidal.
Qobuz and Tidal comparison
They are doing serious demonstration.
The conclusion is that Qobuz give more realistic bass and nuanced details than Tidal.
It is because that Tidal use more compression.