That's unstrung and strung weight... same goes for balance.
Wilson can improve the quality control. But then where do they get money to pay Fed and Nadal?
Nadal Is Babolat, not wilson.
Well would you want to pay 100 more per racket for better quality control? and will others too.
My K-Blade 98's are 9 grams apart and my AG200's were about 14 grams appart.
Now I've switched to Dunlop racquets and both racquets have the same serial number so I know they are pretty similar.
How can two racquets have the same serial number? Or were you referring to model number?
I had two Slazenger ProBraided Xtreme's, and they weighed, felt, and played very differently. Now I have two PD+C's with consecutive serial numbers, and I can hardly tell them apart in play.