I pick Arc10 because of the design (at first time xD... It's "macho" lol). But I believe this racket is a good one.
My guess is Arc9, is not gender limited, I would say... This product may be used by men. They're design for weak wrist right? That means your power will be amplified
for thin / weak men who love to play tactical, this racket can turn you into a power player. (probably xD... Just a guess lol).
I have yet to try the Arc9, but I've tried the other two. Arc10 is my favorite for the moment and Arc7 is a bit too flex. Arc9 seems to be a flex racquet too, I'll try it someday if I can borrow one from the female players out there. Haha...
As said b4..
Arc9 Shaft is more flex than Arc7/Arc10.. For beginners or weak wrist mens.. its a very good racket cos they cant generate enough power/speed to hit the ball.. When u get better & better in strength to swing fast.. u will only find the racket too flex..and cant provide anymore satisfying power hits. !!
Base on my 20yrs experience in badminton.. this is what an example i come out with...
Good Strength + Stiff Racket = The Big Bang
Weak Strength + Stiff Racket = You Sucks!! :P
Good Strength + Flex Racket = Unsatisfying player.
Weak Strength + Flex Racket = A good player.
This are just theory and can be adjusted by the tension of the string to balanced the rackets.!!