The OSS Radeon driver also analyze the command stream of fglrx to match it in cases where neede. Nouveau is not an attempt to reimplement the Nvidia driver bit for bit and both Nouveau and Radeon are using the Gallium 3D frame work. AMD has fulltime emploies working on the Radeon driver, who also havedirect access to documentation that normaly can not be obtained out side of AMD. I don't really see any thing pointing to Nouveau being more likly or performing better then the Radeon driver. Lastly Radeon does alot better for reclocing then Nouveau.
Originally Posted by Kano