What's the difference between a facebook status and a Twitter status?

I still have a bad taste in my mouth from having joined Twitter. When I "join" or commit to something, I think about what I am going to give up in my life for that thing and whether it is really worth it. Where will the time come from? What won't I get to do because of it? And how can it come back and bite me in the a$$? Look at that, I am still uncomfortable writing naughty words. If you only heard me in my off hours. Why is the interwebz so judgmental? Anyway.

My LinkedIn account has just become a big database of people that I am willing to assist and who are willing to assist me.

Facebook is a collection of people I knew or know, not necessarily deeply but I've met them and I wasn't completely turned off by something that they did or said  (hey, there's a little ego boost FB friends! Hee!). Except one ex-boyfriend who has to be the outlier in my "all my ex-boy fiends turned out to be nice guys" theory. I'm still exploring the psychology of un-friending someone who once meant something to me.  Don't worry, he won't find this. He's too busy telling everyone how great he is. But back to my FB pals, they are people that know something about me, either professionally or personally.

Twitter...people who have agreed to "follow" me. I'm not understanding exactly how Twittering would be any different than updating my facebook status. I have boundary issues anyway. I am an over sharer. And because of where I work and who knows me, I am careful(ish) about my FB status updates. I guess my question is this: what additional content would I share on Twitter that I wouldn't share with the people I know least as facebook friends (which I am saying are professional acquaintances)? The boundary line appears to be the same. So Twittering means that I share status updates with my "followers". Yes, here is some kool-aid...I shall lead you to Shangri-La, my people. Just walk this way <and then I make all the people behind me sashay and shantay just like me>. But the Twitter peeps can't see my photos and the fact that my best friend in life truly should be Tori Spelling, just like I always thought. So facebook is like Twitter plus? Is that what this means?

I imagine that some people feel extra free to share with people they don't know. For me, it's the opposite. I always feel like people will make the connection between me and what I do. Working at Microsoft, I am expected to have a personality and opinions. But would I share details of my (ahem) "private" life? There's an false sense of comfort that social networking brings; people say things online they would never say in person. Why is that? Uh, would I want to look back on all my revealing posts in 20 years? Hmm. Looking back on college now hurts a little. With a little funny on top. And a sprinkling of irony. And beer. What was I thinking? Am I going to look back on my blogging and facebooking and Twittering and think the same? Ugh.

If I had a huge stack of money, decided to tell the world to bite me and had no worries of security, then maybe...maybe, I would be a more open. Like some people are; sharing details of body rashes (no, I don't) , cranky lovers (not recently), what they *really* think about people (not you of course).  I have some stories to tell, but I'm not going to tell them.

All that not withstanding, what, exactly, is the delta between my blog posts, my facebook status updates and this whole Twitter thing I may or may not get myself into? I am not doing the whole "What do my readers want to know about me" barf. I already know that you don't give a rip about what I am having for lunch. I am asking what people want to know of anyone, where are the boundaries and how do they differ based on different tools and relatively similar audiences? And are people expected to make it extra "transparent" when it's truly only 140 characters?

What say you?