There is a strong link between at least moderate prosopagnosia and aspergers. I have never heard a link between it and schizotypal.

When I had the DX schizotypal I hadn't really heard much about aspergers. So I thought it could be possible. But thing is, if aspergers explains something within a personality disorder better than the PD, even if you reach up formally to the PD, the aspergers and not the PD DX are set. AS and PD can be set together in cases where the PD is very prominent. But it will never replace AS if AS explains things.

Now you might not have AS a diagnosis anymore but the same goes with autism spectrum.

Maybe find those symptoms you have that are exclusive for AS that don't exist in schizotypal.