A big advantage of Qobuz is access to hi-res material in FLAC. Tidal packages anything higher than 16/44.1 in MQA. I don't trust MQA nor Tidal's peddling of it, and that's a reason why I listen to Qobuz streams most of the time.
When comparing 16/44.1, it's hard to tell any differences between the two. It all comes down to the master. I have a subscription for both out of redundancy. There are occasions where one service will not have a track or album, but the other will.