For me, the main reason for me to get Qobuz is because my classical music albums comes with the booklet in Qobuz. Unless Tidal has changed, I don’t think I can read the information booklet in Tidal.
There are some non-classical albums, e.g. k-pop or canto pop or even Canadian pop (Carly Rae Jepsen) that are not available on Qobuz. But since they are not my primary interest in music, I just live without them. There is always YouTube.
When I had both Tidal and Qobuz at the same time, when the album is identical, I have not noticed streaming from Roon in my system to make a difference to the sound. But that’s just my system.