ambiance vs genius loci

ambiance and genius loci both are nouns.

Word	Noun	Adjective	Verb	Adverb
ambiance	Yes	No	No	No
genius loci	Yes	No	No	No

As nouns, genius loci is a hyponym of ambiance; that is, genius loci is a word with a more specific, narrower meaning than ambiance:

Other hyponyms of ambiance include gloom, gloominess, glumness, miasm, miasma, feel, feeling, flavor, flavour, look, smell, spirit, tone, headiness.

ambiance (noun)	genius loci (noun)
the atmosphere of an environment	the guardian spirit of a place
a particular environment or surrounding influence	the special atmosphere of a place