[ADMIN] Postgres vs. Informix

[Kief Morris]

I'm getting pressure to switch over from Postgres to
Informix, because the web hosting operation I'm
going to use for my project has Informix already.
Are there any reports on comparative performance
statistics, and/or any other comparative measures?

Failing that, *objective* comments on relative 
benefits would be welcome, preferably of the 
non-flammable variety (no trolls please!)

Thanks,
\kief