I'd also add that I've tried both over the last year (was using Tidal for a year or so) and prefer Qobus. The interface on Tidal and it's algorithms for music suggestions is probably better than Qobus. I chose Qobus mainly for it's seamless integration with the Roon music system. I also found Qobus to offer better sound quality in it's hi-res files but that is purely subjective.
I was a long time Tidal subscriber but moved to Qobuz. I prefer Tidal on the full package, discovery, curation and playlists, all lacking for my tastes on Qobuz. But add Roon in the mix with Qobuz's sound quality and that's perfect for me.
I was trialing Tidal for about 15 days, switched over the kids from Spotify to Tidal, tried to move from Single Hi-Res to Family and was unable to unless I started with another email address. Tidal family is $29 while Qobuz is $24 - pretty easy decision from there.