The difference is that my Rov is alive. that is exactly the difference the Ran says.
I didn’t see the words of Reb Moshe that you are referring to. It sounds from your words that he is saying that it is Fregt Up by other Rishonim. And as I said, it is normal in Halacha not to follow a Rishon when it is considered obscure. I agree again that the Halacha does not follow this Ran.
BTW, that wasn’t a lecture, it was my actual opinion. That is the way I learn a Rishon, don’t you?