It definitely manifests as that to some degree, but since it extends to hair, clothing, what car they drive, I think it's a more general situation.

(But I'm also not specifically aware of face blindness as a condition, and had assumed it was generally some form of aphantasia.)

I would tentatively suggest OP does. I hace aphantasia but meet a lot of people for work and have a very good memory for names once I see a face.