postgresql VS mysql .. when which is better ?

[daemonfowl]

Hi everybody !!

I'd like to ask you about mysql VS postgresql .

Maybe there no point arguing that one is always better than the other ..
Are there any particular cases when postgresql is more advisable to opt for ?

eg.0 : mediawiki
eg.1 : nginx/apache ?
.. etc

Would there be any noticeable difference using one with such apps ?
Or is it all a matter of habitual first-used-app ?

Thank you !