Many people use Blogger or WordPress for their free blog server. Each gives simplicity for user who want to post a blog. But on storage capacity, wordpress is 1 step over blogger.
WordPress gives user free 3GB storage for posting and media upload. Then blogger just 1GB storage. But, in blogger, if we lack in storage, it still could be taken separately from GMail storage.
Whatever they were offered, we’ll wait for improvement of technology from both blog server.