well, why would someone realistically need to know? i dont share stuff about me unless someone asked AND if it is a good place to say so. generally work environments is a no go, as sharing your orientation kinda alludes to something
basically nothing, if we were being completely accurate, pan would like more than two genders while bi would like two. however, several people use it interchangeably. typically these would come without preference, but its a hassle of figuring out what exactly your preference is, so people still use these as an umbrella.