The lower CPU score is the better score. I don't remember exactly what the engine does, but it has the CPU calculate something and scores it based on the time to do so.
As the game is currently very cpu bound, the lower that score, the better your machine will perform over all in RO 2. We are working hard to optimize this by lowering the amount of things the CPU has to do at any given time (one of the major ones being draw calls in the rendering thread).
The OC isn't really that much of a gamechanger, I do find it is better than the standard 3.3-3.7 standard clocking of the 1100T. Again, driver version and things like that make a bigger difference than a modest OC. I'm using 11.8 CCC with 11.8 CAP3. There is also the fact that even though your card is newer/better the software may not be utilizing it to it's full capacity. My GPU usage in-game is anywhere from 75-99%.