I just saw another thread in which the poster mentioned buying a Wilson racket. His first modification was adding a leather grip, which added .3 oz to the racket weight, which works out to approx 8 1/2 grams difference.
As for my sticks, I stuck with the HiTec synthetic, removed head tape from the heavier one(had used it to replace bumper guard). Both rackets are now 11.0 even.
I had previously used a 11.5 oz racket, but find I am playing better with this weight. It is still sturdy enough. However, anything below this and I can feel the lightness