The two are quite different.
iTunes Match makes all items in your iTunes collection available online for access to your other devices. Songs you have purchased will be available, as with 'Tunes in the Cloud'; songs you have for example ripped from CDs you have bought will be matched by the version in the Store if this is available; if it isn't available your copy will be uploaded for access by other devices.
Apple Music music allows you to stream, and download to the current device for offline listening, songs from a large proportion of the stock in the Apple Store. While you have it songs you rip from CDs which are also in their library will have DRM (protection) unless you currently also have iTunes Match.
For a full explanation please see http://rfwilmut.net/notes/applemusic.html