Well it's not really a fair contest. Since Facebook has about 50x more things you can do on it of course people will use it more :/
I'm jumping on the bandwagon with Facebook. I only use Twitter as a promotional tool and that's been a little on the rocks lately.
i never really found a use for Twitter i have a phone if i wanted to tell people what i was doing i would call / text them. Facebook for adding people i wen to school with.
I am using neither Facebook nor twitter and so I am spending no time...on either of them! Regards, RightMan
Facebook by far... That is because this is where I catch up on weekend events that are going on with my friends and family.