literary genre vs writing style

literary genre and writing style both are nouns.

Word	Noun	Adjective	Verb	Adverb
literary genre	Yes	No	No	No
writing style	Yes	No	No	No

As nouns, literary genre and writing style are synonyms defined as:

literary genre and writing style: a style of expressing yourself in writing

Other synonyms of literary genre include genre.

literary genre (noun)	writing style (noun)
a style of expressing yourself in writing	a style of expressing yourself in writing