First The Beta 7000 did give higher scores than the RC1 does, there is a matrix in the program that asses the computer and provides the score, the matrix limits the score based on conditions, example a WHQL certified driver will yeald better scores than a non WHQL driver will, also a DX10 driver will provide better scores than a DX9 only driver will, So if you want the same score as them, you need to use the same OS version, and the same drivers.
Second Just because the score is better does not mean the performance is better,
the matrix works like an old BASIC program with (If then) statments
furthor example Vista uses a difrent matrix than Win 7, the fatest card in the world will only yeald a 5.9 in vista, However the performance you get in gameing will still be relative to what the card can do, not what vista says it can do. That same card in Windows 7 may yeald a 7.0, because it's not DX11 certified, a diffrent card might be DX11 certified but runn at half the speed, Win 7 may give it a 7.5, but in real life the faster DX10 card will blow away the slower DX11 card in frame rates, and actual performance.
Another example of WEI flakyness, You could have 12 GB of DDR3 mem running at 1333, and compair that with a system with 3 GB of DDR3 2000 memory, WEI will limit the score because of the amount of memmory, but less memory at a faster speed could actully provide better performance than more memore at a slower speed.
Scores are difrent because the rules change during the game, it's a beta, and there still tweaking it. It's programed to look for specific conditions and add or subtract based on the condition, it does not realy mesure performance
Another example I have 2 295 cards running in Quid SLI, (about $1100) worth of video cards, Windows only grades the 1st GPU, so someone with a 275 ( a $250 card) would score the same or higher than me, but in real life with a program that supports SLI I might get a frame rate of 45, and he might get a frame rate of 14, despite having the same score.
