I don't think I can ultimately say that they were superior but I recall a a few masturbation experiences that are highly memorable.
One was when a girl who was masturbating me commented on how small my penis was. ( our first sexual contact and she had no idea that I have a SPH fetish) I enjoyed a very strong ejaculation as soon as she made her observation.
Another time was while I masturbated watching my current girlfriend being fucked by an ex boyfriend. She looked at me pulling on my tiny dick while he was giving her an orgasm with his much bigger cock.
In another scenario I came very hard close after a female housemate walked in on me while I was wanking. It was just a quick peek and fast exit but the fact she had seen me was very exhilarating.