memetics vs scientific theory

memetics and scientific theory both are nouns.

Word	Noun	Adjective	Verb	Adverb
memetics	Yes	No	No	No
scientific theory	Yes	No	No	No

As nouns, scientific theory is a hypernym of memetics; that is, scientific theory is a word with a broader meaning than memetics:

memetics: a theory of mental content based on an analogy with Darwinian evolution.
scientific theory: a theory that explains scientific observations

memetics (noun)	scientific theory (noun)
a theory of mental content based on an analogy with Darwinian evolution.	a theory that explains scientific observations