Google brought out the Google+ Pages for Brands and Business Houses. The question most likely asked is if you are already on Facebook then why should you be on Google+. The answer is simple if your Target Audience is on Google+ then you need to be there as well.
All the answers will not emerge today. As we use the two platforms we will start to realize the difference. There are some definite functional differences that you will experience on the two platforms.
There is no harm in being on both the Social Media Platforms. What do you think?