different from or different than?!

That's why didn't specify where you hear "different than". I knew "different to" was not American, but I didn't know the extent to which you might hear "different than" in Britain.

Thanks.

I was taught English by English people from kindergarten to end of high school, and I do not recall them using "different to".

Teachers in England often carefully use "different from" when teaching English, or in other pedagogic situations where they are being careful about the words they use, because they have been told by someone else that it is right. I expect they say "different to" when not being self-conscious about it, because nearly everyone does.

It's funny, when I was young I thought I uniformly did as I had been told at school and spoke/wrote "different from". However when I gained typing fluency at about age 24, I then discovered that my first instinct, when typing away fast enough not to be self-conscious about it, was to type "different to". Thus I presume that I also said it whenever I wasn't being self-conscious about it - in fact I then listened out and "caught myself" saying it. It shows how strongly engrained it is.