Qobuz or Tidal?

I have both.   Tidal since 2014 and Qobuz since November.
That being said, if I had to choose one over the other, I’d pick Qobuz.  (1) to my ears feel that the SQ is just a smidge better.  (2) Have nothing against MQA, but all things being equal, prefer ability to stream and play hi res files in native fashion.   (3) At $150 a year, Qobuz is a little bit more cost effective.

Can’t really go wrong with either pick, and Roon supports both of them.

I believe they both offer free trials. I prefer the sound of Qobuz hi res over Tidal, but I’m sure there’s others who feel the opposite. Also, a lot will depend on your listening tastes and which service has the best selection for your tastes.

They're essentially neck and neck.  I choose Qobuz because I like the warmer frequency balance and its pretty good selection of classical music but your mileage may vary.  Try 'em both.  Putting it another way, I'm glad Qobuz exists, but if it didn't I'd be living happily with Tidal.