Ask HN: What are unique differentiating factors of AirBnB from CraigsList

This question over here is mostly for group mulling. I have done fair amount of reading on the subject. Though the question might appear pretty similar, just wanted to know the view point of folks present here.

So how do you think AirBnB is different from CraigsList? Things to exclude from answer-

ArBnB has taken only one vertical and monetized it.