I have both Qobuz and Tidal and listen primarily via Roon. When mobile, I use Tidal alone rather than Qobuz or Roon's ARC. I find the Tidal interface to be easier for mobile.
There shouldn't be a difference in SQ unless they are different masters. In general, the only difference to me is the different libraries of music. Occasionally Qobuz seems to have their servers at capacity.