Why choose >.> I'd have both. <.< Either way it's your preferences...
Hinata - Cute, Shyness, development, voice, face, hair color, goals...
Sakura - Bold, Cute, fashion, temper, love life, personality...
In my eyes Hinata has more things than sakura has. Hinata is a lot easier to approach as Sakura is harder to get through with. Both have feelings for 1 person meaning they would both be loyal and stuff like that. I mean really it's a hard choice.
I stick to my "Have both" 3rd choice. >.> Hinata is hotter anyways, but think of what sakura can do :O