Jim,
This is about the best explanation from them that I found. I subscribe to both Tidal and Qobuz and am happy with both services. My dac is nos and no mqa either. I believe I pay $4 a month less for Qobuz.
Nick
Here’s the Tidal link:
https://tidal.com/whatistidal/ Premium for $9.99 / month
For $9.99 per month, TIDAL's Premium tier gives users unlimited music across multiple devices including smartphones, computers, and tablets, as well as access to exclusive TIDAL X events. TIDAL Premium subscribers can also create playlists and download songs to their devices for offline listening – all without intrusive advertisements.
HiFi for $19.99 / month
TIDAL's HiFi tier gives subscribers all the same great content and experiences as a Premium subscription, except music is delivered in lossless, CD and Master Quality Authenticated (MQA) quality (1411 kbps vs. 320 kbps for standard streaming).
HiFi streaming delivers an uncompressed sound file, which means that you can hear every instrument and every note – as the artist intended. This tier costs $19.99 per month.