said 1 year, 4 months ago:
Here is how I see them.
Sharing your content on facebook is like standing in the middle of the mall and talking to no one in particular. People can see you talking as they walk by, but hardly anyone will stop and interact with you–except those that are in your inner circle.
Sharing content on Google plus is like attending a sit-down dinner party. Some of the guests could be total strangers to you, but you can be sure that there is going to be a lot of engagement going to happen.
I have observed that g+ members actively interact with the community. They share, +1, and comment more often than their facebook counterparts. I also noticed that most of them are early adopters of technology and are active in social media. There is a good chance that the number of these g+ natives are influential with their own social networks.
If you want to build credibility by word of mouth, I will recommend that you establish yourself first with g+. Make yourself a valued member of that community. You can maintain a FB fan page on the side, but give more attention engaging with the g+ community.