I don't understand this whole Apha kit vs. Beta kit nonesense.
It's asthough some people expected games graphics to magically get better moving from an alpha kit to a beta kit..... but why would they? I can see the framerate improving, but not the graphics.
When it comes to the screenshots that the devs are releasing, there's absolutely nothing that the Beta kit can render than the alpha kit couldn't.
If you do see a difference in graphics, it's more likely that the graphics have simply improved as development time passed, and not the Beta kit "magically" making the graphcics any better.