Pick one that suits your personality the best I would say. If it was me (but it isn't hehe), I will pick #2. When I went to see my yorkie, he was the only one but I can see his personality. He was a little shy, a little (very little) timid but I know that being with me, he will grow in confidence and flourish and I was right. When they go to a home full of love, they will turn out great and I don't have trouble toning him down coz he is pretty mellow himself, very easy to control heehee. Put it that way, I have a passive personality and I chose a passive pup coz I can understand him easily that way. My hubby who is more outgoing and hyper finds my yorkie too sucky but I am the one who takes care of him and spends most time with him.
That being said, my sister who wanted a maltese puppy brought me along to choose a puppy with her and she wanted a more playful and crazy outgoing one not to mention a little hyper and we chose the most playful one. We chose one that is on the extreme end of hyperness and naughtyness :P. She got returned once because the owner couldn't handle her personality. She is a handful, very naughty and very very vocal but her personality goes with my sister's personality and they make a happy two
My mother finds my sister's dog funny but annoying at the same time (my mom is passive too) but we all love her for what she is. I don't mind visiting her dog coz she is a clown and very funny indeed but I don't think I can control her, it will wear me down just too much. If you think you can handle a little energy and will be able to control and tone the dog down a little go for the bolder one. Either way, you will end up with a bundle of joy
Good luck and let us know which one you finally bring home!