musical genre vs music genre

musical genre and music genre both are nouns.

Word	Noun	Adjective	Verb	Adverb
musical genre	Yes	No	No	No
music genre	Yes	No	No	No

As nouns, musical genre and music genre are synonyms defined as:

Other synonyms of musical genre include musical style.

musical genre (noun)	music genre (noun)
an expressive style of music	an expressive style of music