7grs ins't a big deal, is between the manufacturers tolerance index. I've experienced diffrences over 15grs (lighter) with head racquets. But the weight and balance is something you can fix. In my case, the main difference was the stiffness, bought 3 fxp prestiges mp's, one was perfect, the other 2 were unplayable: balance, weight and stiffness were totally off. I ended selling them all...
Volkl C10 Pro