Complete Guide to Differences between Static site, Blog, Forum and Wiki site

You may want to check out my article about basic knowledge of Static sites, blogs, Forums and Wiki before reading the differences. 

Blog	Static Site	Forum	Wiki
Content Updated almost daily or may be several times a day.	Updated very few after initial setup.	Due to several thousand or lakhs of users, content may get updated several thousands times a day.	New informative content added by thousands of users daily.
e.g.- Blogger.com and Wordpress.com blogs	e.g.- Official sites of Universities and Colleges. My site	e.g.- Warrior Forums	e.g.- Wikipedia
Comments Commenting System available.	No default commenting system but Facebook Comments may be seen on new sites.	Comments form the content called as threads.	No Comments, direct editing of original content.
SEO – Search Engine Optimisation Are highly optimised for Search Engine Optimised by default.	Are less Optimised for Search Engines.	Are highly optimised along with additional weightage given by search Engines like Google, Yahoo.	Are trusted by search engines and are given additional weightage by search engines like Google, Yahoo.
Crawled frequently by Search Engines.	Crawled comparatively less by Search Engines.	Crawled frequently in intervals of seconds.	Crawled frequently.
Covers a large range of topics from news to trends, fashion, technology, computer and gadgets etc.	Limited topics, used mostly for branding single product or items of one company.	Single category with several sub categories like gadgets forum hosts sub categories like from different companies, their uses, configuration etc.	Covers large range of topics, do not show trending topics but information about certain things, say Wikipedia for Educational Purpose.
Homepage keeps on changing.	Static Home page.	Keeps on changing like trending topics and threads, unanswered threads etc.	Homepage mostly shows list of all categories and consist of several hundred categories.
These are like Newspapers with latest topics updated regularly.	These are static and used for branding.	These are Discussion rooms targeted for specific topics.	These are like teaching classes.
Blogs may or may not employ login system.	Static Sites may or may not employ Login System.	Login feature is must for content creators and readers also require to login for descriptive reading.	Employs login if user wants to edit the existing articles.
Cheapest and Easiest to set up.	Comparatively Expensive than Blogs.	Most expensive and requires huge marketing to attract users initially.	Equally or less expensive to Forums but more expensive than Static Sites.
Most User Friendly.	Less User Friendly.	User enrolment is high. Mostly basic commenting type system so user friendly.	Editor is Complex but User Friendly for Experienced Users.