doesnt matter seo wise just really coding wise. if your looking for coding that is small and compact go with "<b>" if you want it to be big and heavy duty go with "<strong>" thats what I use.
Very interesting thread. I have heard that some SE like the <b> some strong... That is very interesting if someone have made research of that?
@OP - I'm not replying you I would like to have some answers on the topic related issues