vinifera grape vs Vitis vinifera

vinifera grape and Vitis vinifera both are nouns.

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

As nouns, vinifera grape and Vitis vinifera are synonyms defined as:

vinifera grape and Vitis vinifera: common European grape cultivated in many varieties; chief source of Old World wine and table grapes

Other synonyms of vinifera grape include common grape vine, vinifera.

vinifera grape (noun)	Vitis vinifera (noun)
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
common European grape cultivated in many varieties; chief source of Old World wine and table grapes