Seems like they are the same thing.

Focus inwardly on a single object to clear the mind's obsessions.  Then continued focus on a single pleasurable object creating a feedback loop? 

Only difference seems to be that self-hypno is guided.  Yes?

I don't know much about hypnosis, but self- and guided- look like two mutually exclusive categories to me. How can it be both?

One can guide oneself with suggestive language.

But with either method, as soon as my mind notices pleasure, it wants to move into it.  And that makes it disappear.