What's the difference between cacodemon and eudaemon?

Cacodemon

Definition:

• (n.) The nightmare.
• (n.) An evil spirit; a devil or demon.

Example Sentences:

• (1) In fact it's not even printed, but scorched on to parchment by a whispering cacodemon.

Eudaemon

Definition:

• (n.) A good angel.

Example Sentences: