Nvidia vs AMD open source drivers

[Dan <ganchya@gmail.com>]

Hi,
I would live to buy a workstation and install Jessie. I would like to
use the open source drivers for the graphic card. What would you
recommend? My choices are Nvidia or AMD.

I checked the Nvidia/Debian wiki and the Nouveau drivers seems to work
very well:
"As of jessie, the need for the proprietary drivers is pretty much
over - nouveau now works quite well"
https://wiki.debian.org/NvidiaGraphicsDrivers

Which open source driver is better Nouveau or AMD open source driver?

Thanks,
Dan