Tidal has a better catalog? Here is what I found:
Tidal Music Library
For Tidal, it offers more than 100 million tracks and 650,000 music videos in its library. Users can find music on the Tidal sections like albums, explore, and so on. Besides, it offers more than 25,000 Hi-Res audio quality songs.
Qobuz Music Library👍
While Qobuz owns over 100 million audio. It has more than 424,000 Hi-Res tracks and over 60 million tracks in CD resolution. And you can search on Qobuz for the tracks you want to listen to. Yet, you can't find podcasts, audiobooks and other kinds of content on Qobuz. That's because Qobuz is only a music streaming service.
According to the data of the Qobuz or Tidal catalog, it seems that Qobuz and Tidal have a similar number of music library for users to enjoy music. But if you want to stream more Hi-Res tracks, you can go to Qobuz.
https://www.drmare.com/tidal-music/tidal-vs-qobuz.html
I don't know about you, but that 17 times as many hi-res tracks makes the decision easy for me.