Well it depends on the media for me. I've enjoyed more scifi books, like Philip K. Dick and Asimov. Videogames though, I tend to like the fantasy setting more, like Dragon Age and Fable. Movies...hard to say, nudge to scifi.
All in all, I think I like the fantasy setting a tad more, so I voted for it. Sometimes real science gets in the way of me enjoying scifi. Tries too hard to sound possible, so I think about it and go "no that wouldn't work, silly" where as fantasy I just go "magic, sure. Can't argue with that." Fantasy doesn't bother trying to sound possible, that's why it's called fantasy. Science fiction can get into bad science too often though, and I hate bad science. Scifi has more potential for depth though, I think. It's harder to do it right, but can come up with some really deep stories, which is why it's so close.
[edit] Whoops, misread the topic, haha. Didn't realize it was an actual battle, not jsut a popularity contest. Hrmm. Well scifi tends to be on a completely different scope usually. Making stars go supernova kind of shit, fantasy doesn't usually go much past destroying a civilization or race. Fantasy heroes tend to have an absurd amount of luck though, fate and destiny and all. Scifi heroes tend to be more tragic, haha. Could see a fantasy guy jumping in a magic portal and blowing up the mothership by throwing a magic sword into the engine core or something, and all the future scifi guys groaning at how implausible it is.
Take out BS luck/destiny stuff and scifi would decimate the fantasy people. Hell, regular old modern technology would have a good chance against it. Super powerful wizard is throwing fireballs, high-powered rifle snipes him before he gets close. Treants and trolls against an Abrams? Good luck, haha. Nuclear strike Mount Olympus, see how immortal they really are.