face recognition vs facial recognition

face recognition and facial recognition both are nouns.

Word	Noun	Adjective	Verb	Adverb
face recognition	Yes	No	No	No
facial recognition	Yes	No	No	No

As nouns, face recognition and facial recognition are synonyms defined as:

face recognition and facial recognition: biometric identification by scanning a person's face and matching it against a library of known faces

Other synonyms of face recognition include automatic face recognition.

face recognition (noun)	facial recognition (noun)
the visual perception of familiar faces	biometric identification by scanning a person's face and matching it against a library of known faces
biometric identification by scanning a person's face and matching it against a library of known faces