I'm way more structured in text than face to face conversation, because without all the context of face to face communication and not having the other person pick up on ambiguities I have to be that way in order to make sense to people. I don't consider this a part that is 'outside myself' from real life. There is no difference, just different muscles exercised in the same body. I wouldn't mind people I know in real life reading anything I write here. If it's not information I want to have public, I will simply not share it.
In chat I tend to be a bit more... whatever. But even that is different in some ways from chatting face to face. I really miss not having all tools of communication available in text, but then again, it has other advantages as well. Textual humor is slightly different from face to face stuff.