Blogs vs. Wiki

For me, I have always looked at my blog as a diary or journal, but kept online. I initially intended to update it daily or weekly, but I lacked the initial inspiration I had. On the other hand, a wiki is a platform that is meant for anyone to update in real time. A blog is owned by an individual whereas wiki is being updated by many people around the world. So personal versus sharing.

For blogs, the timeline is more important. For wikis, when an article was published matters less, because articles are supposed to be updated as new information becomes available. Blog posts are usually one persons' opinion, followed optionally by comments. Wiki articles represent consensus, but can have an associated discussion/talk page. 
A wiki is a superset of a blog. A wiki can host a blog, but not viceversa. Too emulate a blog in a wiki, the wiki page needs to be protected against editing by other users than the author, and a comment widget (e.g. Disqus) needs to be added to the page. 

A wiki allows multiple users to create, modify and organize web page content in a collaborative manner. 
A blog is a Web site that maintains ongoing posts. A blog is frequently updated,a personal Web site featuring diary-type commentary and links to articles or other Web sites. 

Wiki: 

• Multiple Authors, 
• Edited by a group or team, 
• Contains links to other Wiki pages, 
•  Continuously changing and growing rapidly, 
•  Many-to-many communication. 

Blogs:

•  Usually a single author. Sometimes can have multiple contributors, 
• Author posts, user comments, 
•  Opinion Sharing , 
• One-to-many content.