variorum edition vs variorum

variorum edition and variorum both are nouns.

Word	Noun	Adjective	Verb	Adverb
variorum edition	Yes	No	No	No
variorum	Yes	No	No	No

As nouns, variorum edition and variorum are synonyms defined as:

variorum edition and variorum: an edition containing various versions of a text or notes by various scholars or editors

variorum edition (noun)	variorum (noun)
an edition containing various versions of a text or notes by various scholars or editors	an edition containing various versions of a text or notes by various scholars or editors