I think that for now Facebook is more efficient because more and more individuals are there than on Google+ for now. But this does not mean that it's going to stay like this. Google+ is Google after all and it's excellent to have that in thoughts.
Facebook has worked like wonders for me but I would suggest you to go with both as you will get more reach. Also, I have noticed that G+ isn't that strict when it comes to banning of multiple profiles, as regards to FB.