Yes [there is a difference between Facebook and a blog.] In sum: I can read anyone’s blog without needing their approval first, and anyone can read my blog without needing my approval first. I *like* not knowing who all is reading my blog. I intentionally *optimize* it so people I don’t know might find it. That’s how people get book deals, son.
But also, I think blogging is more about long-form writing than short-form sharing (Facebook).