Competition



"Competition has been shown to be useful up to a certain point and further, but cooperation, which is the thing we must strive for today, begins where competition leaves off."

-Franklin Roosevelt

Among Wiki pages themselves

 * Wiki-Generating sites compete against one another
 * Different features and options make some more popular than others
 * Disadvantage/advantage

Social Networks

 * There are still some big differences

Blogs

 * Both are mainly for entertainment
 * Similar interface
 * Similarities and differences