I would try both and then see which one works better, faster. But maybe if I have to choose I say: Facebook.
Friends from India then Orkut, If you want people from elsewhere then choose facebook, although there are many people from India on facebook as well
For me it's facebook. I can do a lot on facebook in terms of communicating, sharing site, photos and videos.
I think facebook is best option and you can't compete orkut with facebook, facebook is giving challenge to google.
I think you should go for Orkut. Indians are crazy about it and you will find most of your friends over there.
Its obvious to differentiate between Orkut & Facebook! Facebook also leads in India because due to its ground breaking features & style