Alpha = Pitcher
Beta = Catcher
Gamma = Both?
So... Since Naruto is Gamma (which I agree on) and Sakura's Alpha, Naruto would be catcher, so to speak. So what if Naruto and Sakura were both Alpha?
....
No, Sakura is the female Gamma type. Both Naruto and Sakura are Gamma types.
Ino and Karin are the female Alpha types. You can see it the strongest in their sexuality. Ino dresses and holds herself showing a confident dominance in her sexuality. Karin never overtly displays her sexual attraction to Sasuke when Suigetsu or Juugo are around, but leeringly thinks of ravaging Sasuke while he was unconcious, jumps right to coming on strong, overtly sexual when she is alone with Sasuke.
Hinata and Kurenai are Betas, even mild teasing by a friend about their feelings for another causes embarassment
Sakura and Tsunade are Gammas. They are quite open in gestures of affection, open about their romantic feelings in public, most likely of the three types to get swept away by their passions in public.
Those type Alpha and Beta females believe one must have control in their passions. Alpha's to be in control of the situation, Betas out discomfort of being the center of attention. There are openly sexual types in Alpha and Beta types, and the openly sexual Beta type comes close the Gamma type's sexuality, but there's more self-restraint in their actions- they don't get swept away. Anko would probably be the best example in Naruto of the overtly sexual Alpha female and Orochimaru the overtly sexual Alpha male.