I came across HSP before coming across high functioning autism, and as soon as I understood the latter, I pretty much agree with you that the two overlap, and wouldn't be surprised if they're identical.

But I think to then say people who recognise they are highly sensitive have a kind of superiority complex is a little paranoid.

HSP (and autism) would both go some way to explaining some shit in my life, and help me understand things. But when I was assessed for autism, the assessor didn't know. She concluded 'probably just childhood trauma'. So I'm reluctant to say I'm autistic, because I still don't know. There are people much worse than me.

Nonetheless, to find an answer that explains our life experiences and embrace that is not demeaning people who do have a diagnosis. I don't wear a badge for either condition. But I know I'm different.