How do you tell the difference between the Beta and RC versions?

1) In the right hand corner of the desktop it should say: Windows 7. evaluation version build xxxx If the build number is 7000 you habve the beta If the build number is 7100 you have the RC 2)Start orb -> type in "winver" and hit enter. Look for the build number (towards the top). Interpretation of them is the same as above

Thanks