Google Plus is for sharing what you read. Facebook is for sharing about your life.
We all have some friends who share waaaay too many articles on Facebook. I go to Facebook to see what’s happening in my friend’s lives. Sure, sometimes an article might be pertinent, but not when there’s an abundance of articles in my friend stream.
Articles are best shared in Google Plus. I explain more in a blog post on my spudart blog, “How do you use Google Plus?“