Aren't the Article content type and the Blog module the same? Here's a small question, if Drupal already has an Article Content Type, what then is the use of the blog module? Aren't they supposed to be the same?
The blog module allows several users to have different blogs. It adds more features that are typically found in a blog to the article. If you are making a single author blog it might be better to build with Views using the Article content type than use the blog module.