postgre vs MySQL

Hi,

I am a database professional but have never used Postgre. My client was exploring the posiblity of using Postgre instead of Mysql and wnated to know the comments from the community.
I waned you people you post your views on the following comparision points
1] Performance
2] Scalablity
3] community support
4] Speed
5] ease of use
6] robustness

Any major clients of the two.
You can add you own points too.

Thanks ,
Rahul.