For some games, I think the Edge definitely provides nearly perfect 1:1 movement (COD and BF3). However, in my experience for others like Gears, it does not, even if you aren't red lighting. If you are having acceleration problems, try a curve like this:
>>> XIM Edge Ballistics START Paste >>>
XEBH:01002341586D79858D9295989A9B9C9D9E9FA0A0A0A00807
XEBA:010020405A6F7C88909497999B9C9D9E9FA0A1A1A1A1E803
<<< XIM Edge Ballistics END Paste <<<
The point is to add acceleration that cancels out the acceleration felt in the game. You'll have to play with the sensitivities since you have a higher DPI mouse than me.