radeon is better than nouveau, thanks mainly to documentation. HOWEVER, nouveau 3D does actually work VERY well despite that.I don't know about you but I do like to have 2D and 3D and working in a usable fashion. If both open source drivers do this fine, okay, but I'm not sure.
3D really is there -- VERY usable. 2D in open source actually EXCEEDS 2D in the blobs. BOTH of the open source drivers support linux-specific functions FAR FAR better than any of the blobs. Their features are worked on roughly in order of what is most likely to be used by linux users. The blob drivers are built for windoze users, so features that make sense to a linux user tend to be neglected.
What is EXTREMELY IMPRACTICAL is trying to make the blobs do anything useful. Better to forget about them -- even if you AREN'T trying any weird combinations like mixing an AMD and NVIDIA card in the same machine.
The problem with using different computers for it is that unless the rest of the hardware is identical between the two machines, you aren't necessarily comparing what you THINK you're comparing.Anyway, I find this an interesting topic. I know it's way more convenient to have separate computers for these tests but for a little while, I probably won't have that option unless I can borrow/share the other computer.