what does iTunes match do vs Apple Music

Hi,

iTunes Match subscription allows you to add music to the iCloud Music library. This allows you to use your music on other devices. Music is either matched as 256 Kbps AAC or uploaded as is except for lossless track which are transcribed to 256 Kbps AAC. Mp3 or lower bit rate tracks that have been been matched can be upgraded to 256 Kbps AAC by removing the original and re-downloading new version.

Apple Music subscription includes ITunes Match features.Additionally you will have access to music from Apple’s services including lossless and hi-res versions. Like iTunes Match, you can replace matched tracks with upgraded versions BUT lossless or hi-res are only available as long as you have an active Apple Music subscription. You would need to revert to AAC version before cancelling your subscription.

You should keep a separate backup of your own music.

Jim