Does any good comparison exist (like a table of present features) between the many Linux distributions? 

What are the features and advantages on each distribution? ([Ubuntu](http://en.wikipedia.org/wiki/Ubuntu_%28operating_system%29), [Fedora](http://en.wikipedia.org/wiki/Fedora_%28operating_system%29), [CentOS](http://en.wikipedia.org/wiki/CentOS), etc.) 

What choice is better for what kind of user profile?