Just wait till both are released and look at reviews. These threads are pretty useless when both games are released due to differing opinions, this is exaggerated even more when neither game has been released yet.
L.A. Noire hands down. Super unique game that I predict will change the industry as opposed to what looks like a better Team Fortress 2. Brink looks good, but it won't top L.A. Noire anyday.
But Brink does have a story line, and you get both sides of the story!
I know but I think L.A. Noire will be up there for best story/single player of the year and that's saying a lot with all the good titles coming out this year.