Google+ would take time, facebook is currently on top, so choose it. My advice is go with both or even to more. More social marketing in different engines more chance to gain popularity.
I prefer both they are promoting own way. As far i read google+ through google dot com and facebook with their own way.
i agree with megtyler. if you plan on staying on top of the game you have to start utilizing google+ in conjunction with the already popular facebook.
i used google+ code for my site but after some days it disapear automatically and i have to put it again is there any solution?
Facebook is one of the best Social media site...i can not say that google+ is not good but more people using facebook and they are trust on it...and it is very user friendly...
More Popular is Facebook, because Google+ is a latest update and Facebook is running from a long time.