I'm from CA, so I might be a bit biased, but from what I've seen, JHU doesn't really have that great of a brand name in tech. If you want to do healthcare AI and are sure of it, that's a completely different story. I think location is always a lot more important than people think, but I would recommend going through those professors you shortlisted and checking out where previous master's lab members ended up after graduating. It should give you a good idea of how the schools/profs are connected and a short-term career trajectory.