critical apparatus vs criticism

critical apparatus and criticism both are nouns.

Word	Noun	Adjective	Verb	Adverb
critical apparatus	Yes	No	No	No
criticism	Yes	No	No	No

As nouns, criticism is a hypernym of critical apparatus; that is, criticism is a word with a broader meaning than critical apparatus:

critical apparatus: the variant readings, footnotes, etc found in a scholarly work or a critical edition of a text.
criticism: a written evaluation of a work of literature

Other hypernyms of critical apparatus include literary criticism.

critical apparatus (noun)	criticism (noun)
the variant readings, footnotes, etc found in a scholarly work or a critical edition of a text.	a serious examination and judgment of something
	disapproval expressed by pointing out faults or shortcomings
	a written evaluation of a work of literature