I like the second one with the faucet, but the vanity is very cottage-y to me. Personally, if I had my heart set on that vanity I would choose a different faucet, and then a different sconce. I like the look of the first one but I agree that Edison bulbs are not going to be your friend for bathroom lighting.

I think you'll want to buy two mirrors and three sconces. The balance will work out much better being able to have one above each sink. Furthermore, I would propose getting three lights as that will probably help with ensuring you have more evenly spread lighting to work with in the mirrors. I realize this bathroom vanity is longer but it does have the two mirrors and three lights. Definitely our preference when building.

If you do 4 sconces, 2 for each mirror, it will make each mirror seem its own entity, IMHO. If you do a double sconce in the middle, it seems like.....an after thought? And the sconces will not be equidistant from each other and the mirror. My OCD kicking in, I suppose. If the space between is larger than the mirrors, I think you should go with 2 separate sconces. If the space is smaller than the mirrors, I think you could go with a double light. Just make sure the spaces are fairly equidistant.

Personally, I'm not a fan of mixing metals, but some people like it. In case you haven't run across these yet, Innovations Lighting has a bunch of wall sconces that match the look of your sconce choices, and they are available in lots of finish choices.