I doubt it’s either of those. I can recognize a person at a distance but ask me to describe if their nose bridge is wider or narrower and I literally wouldn’t be able to tell you unless it’s significantly exaggerated.

The question should be, if shown an example nose drawing could you say whether the bridge should be wider or narrower?

Or if shown two noses with different width bridges, can you point to the one that is closer to being right?

Police sketch artist scenes in movies and TV shows are incredibly abbreviated compared to reality, which often features a lot more iteration and discarded sketches precisely because a lot of people are in the "I'll know it when I see it" group.

That explains it. Yeah, I'd be able to point to something that's closer to what I saw.

i have partial aphantasia (I think) and I am quite good at recognizing faces, but I couldn't necessarily visualize one to describe it if not looking at the face