VR-Zone post a short comparison for three drivers. It seems they got their hands on two beta drivers.

The comparison is done with 3Dmark06, Crysis and Quake4. The total 3Dmark score is a bit lower than 169.25WHQL so the two beta drivers need more optimizations.

But in Crysis two beta driver boost 4FPS more than WHQL at DX9 very high. I guess with the new beta they will do more than just comparing.