sweetness vs taste perception

sweetness and taste perception both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweetness	Yes	No	No	No
taste perception	Yes	No	No	No

As nouns, taste perception is a hypernym of sweetness; that is, taste perception is a word with a broader meaning than sweetness:

sweetness: the taste experience when sugar dissolves in the mouth
taste perception: the sensation that results when taste buds in the tongue and throat convey information about the chemical composition of a soluble stimulus

Other hypernyms of sweetness include gustatory perception, gustatory sensation, taste, taste sensation.

sweetness (noun)	taste perception (noun)
the property of tasting as if it contains sugar	the sensation that results when taste buds in the tongue and throat convey information about the chemical composition of a soluble stimulus
a pleasingly sweet olfactory property
the quality of giving pleasure
the taste experience when sugar dissolves in the mouth