virtu vs quality

virtu and quality both are nouns.

Word	Noun	Adjective	Verb	Adverb
virtu	Yes	No	No	No
quality	Yes	Yes	No	No

As nouns, quality is a hypernym of virtu; that is, quality is a word with a broader meaning than virtu:

virtu (noun)	quality (noun)
objet d'art collectively (especially fine antiques)	an essential and distinguishing attribute of something or someone
artistic quality	(music) the distinctive property of a complex sound (a voice or noise or musical sound)
love of or taste for fine objects of art	a degree or grade of excellence or worth
	a characteristic property that defines the apparent individual nature of something
	high social status

virtu (adjective)	quality (adjective)
	of superior grade
	of high social status