What is the difference between Myth and Ritual? Was a dithyramb either?

Myth and Ritual are interconnected. Myth is a tradition and when it is followed with a ritual, it becomes religious. Dithyramb is a myth sung as poem in praise of Dionysus, the God of wine.

Explanation:

Myth - A story of tradition that involved supernatural powers or Godly characters.

Ritual - A ceremony or religious activities performed as a rite according to a sequence as mentioned.

Dithyramb - A poem sung in chorus dedicated to the God of wine and fertility, Dionysus.