I guess I would have to know what you consider winning? If winning means running the world, I say the Zombies. If winning means just staying alive, I would say humans. Well...some humans. I think humans will create "Zombie Free" colonies. But of course....I have a very vivid imagination. :)
Humans will win for sure. We just need to find a place with high enough walls or water surrounding it and wait them out. We'll need to run so make sure and train, I out ran many this Halloween.