Thats a toughie!!!! But I agree with everyone who says get them both!! Two months after I got Pixie I ended up with Paris.... Maybe she'll cut you a deal for the two????? You never know??? And how cool would it to have sisters???
But if its just not in the stars.....
Cuddle!!! My Pixie is so damned independent she runs my house!! And she was the go getter from day one! If I had the pick, I would not choose the alpha dog... I want a follower, not a leader!! I'm the leader! lol but try telling Pixie that!! Its a constant power struggle with her!!

Sometimes I win.. other times.... ehh not so much...
They are both soooo cute though!!!!