muscat grape vs vinifera grape

muscat grape and vinifera grape both are nouns.

Word	Noun	Adjective	Verb	Adverb
muscat grape	Yes	No	No	No
vinifera grape	Yes	No	No	No

As nouns, vinifera grape is a hypernym of muscat grape; that is, vinifera grape is a word with a broader meaning than muscat grape:

muscat grape: sweet aromatic grape used for raisins and wine
vinifera grape: grape from a cultivated variety of the common grape vine of Europe

muscat grape (noun)	vinifera grape (noun)
sweet aromatic grape used for raisins and wine	grape from a cultivated variety of the common grape vine of Europe
	common European grape cultivated in many varieties; chief source of Old World wine and table grapes