gustatory sensation vs esthesis

gustatory sensation and esthesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
gustatory sensation	Yes	No	No	No
esthesis	Yes	No	No	No

As nouns, esthesis is a hypernym of gustatory sensation; that is, esthesis is a word with a broader meaning than gustatory sensation:

gustatory sensation: the sensation that results when taste buds in the tongue and throat convey information about the chemical composition of a soluble stimulus
esthesis: an unelaborated elementary awareness of stimulation

Other hypernyms of gustatory sensation include aesthesis, sensation, sense datum, sense experience, sense impression.

gustatory sensation (noun)	esthesis (noun)
the sensation that results when taste buds in the tongue and throat convey information about the chemical composition of a soluble stimulus	an unelaborated elementary awareness of stimulation