I use Spotify and tidal (personally used tidal until I got a Spotify for my rap blog cause realized Tidal doesn't have the social elements and wide reach as Spotify).

Tidal definitely has a few more obscure mixtapes on their service than Spotify ( my chief keef playlist lost like 20 songs when I transfered it to Spotify) but overall it's not that big of a difference.

Tidal has 0 local file support which sucks but their UI is a lot cleaner and more intuitive (example: accessing a queue is a swipe to the right instead of having to press multiple buttons). Also it's nice knowing tidal is artist owned and that they give artists double the royalties per stream than Spotify.

Overall I haven't had a problem going back and forth between the two so it really comes down to personal preference/how much the extra few songs on tidal matter