tanginess vs piquantness

tanginess and piquantness both are nouns.

Word	Noun	Adjective	Verb	Adverb
tanginess	Yes	No	No	No
piquantness	Yes	No	No	No

As nouns, tanginess and piquantness are synonyms defined as:

Other synonyms of tanginess include nip, piquance, piquancy, tang, zest.

tanginess (noun)	piquantness (noun)
a tart spicy quality	a tart spicy quality
	the quality of being agreeably stimulating or mentally exciting