The answer to this question is a little complicated, as there are a variety of factors to consider. Overall, however, it seems that blogging is better than Facebook for a variety of reasons.
For one, blogging allows for more control over the content that is published. This means that bloggers can be more selective in what they share, which can lead to a more engaged audience.
Additionally, blog readers tend to be more engaged due to the fact that they are able to comment on and share posts directly with other readers.
Facebook, on the other hand, can be less controlled due to the fact that users are not able to post links directly. Additionally, Facebook users can only see posts from their friends, which can lead to less engagement.
Finally, Facebook ads are less effective than those on blogs because people tend not to click on them as much.