Facebook vs Orkut matter is now not pending but it is clear that Facebook is superior than Orkut.
In April 2010 Orkut had approximately 19 million visitors compared to Facebook with 18 million visitors worldwide, but Facebook grabbed the numbers for the limit time in July 2010 with 20.9 million visitors where was as Orkut registration growth of only 16 percent at the same time.
If we talk anout India, it is representing 84% of the total internet uses. This made India first. The search engine Google would have taken even more neccessary step for Orkut nut instead of that Orkut is back down.
So my first preference is Facebook.