Varma: Facebook or Twitter ??

Easy to navigate and update, link to and promote anything
Reach far beyond your inner circle of friends
One feed pools all users; anyone can follow anyone else unless blocked
Pure communication tool, rapid responsiveness
You don’t have to be logged in to get updates; you can just use an RSS reader
Very interactive, extensible messaging platform with open APIs
Many other applications being developed (Twitterific, Summize, Twhirl, etc.)
Potential SMS text messaging revenue from wireless networks (although Twitter states they are not currently getting any cut)
Potential future advertising and/or enterprise subscription-based revenue streams
With its “thin” overhead, Twitter is probably more scalable than Facebook, giving it a cost advantage

Application mashup; find people, make connections, email, instant messaging, image/video sharing, etc.
Most people can quickly grasp the value of connecting with friends, family and established contacts; some people report they use Facebook instead of email and IM
More emphasis on deep connections with others vs. who has the most connections
“True Friends” feature increases your transparency to selected connections; almost like having private and public profiles
Huge, rapidly growing installed user base
Inherit stickiness, third party applications, “gift giving” and personal data collection make Facebook a powerful advertising platform

So at last both twitter and facebook are future social networking websites !!

So according to me I personally feel Twitter is the best !!

Varma