Question: what is the difference between the mind flayer and demogorgon?
Answer: The Mind Flayer, aka the Shadow Monster, is the Big Bad Wolf of Stranger Things 2, and it can psychically control people and other monsters. The Demogorgon, also terrifying, was more like a wild animal accidentally let loose in Hawkins. The Mind Flayer returns for Stranger Things 3, but it might not be alone.