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We use both Google+ and Facebook, and from a simple posting point the experience is essentially the same. The new timeline feature looks pretty nice for a business page, whereas Google+ doesn't really seem optimized for business. The big difference is the number of people viewing/responding to posts. I take care of 99% of the posts on both sites, and the number of responses for a given post is always higher on Facebook. Always. It is also easier to highlight posts that contain media or information that you want to emphasize on Facebook, using the appropriately named "highlight" feature that increases the post from a 1/2 page width to a full page width. When I post new ads, offers or video content, I've found this to be effective at drawing views. Further, in my opinion the appearance of Facebook is slicker and makes it easier to project a more refined corporate image.
Google+ does have a benefit that I suspect, but cannot prove. I recently started new Facebook and Google+ accounts at the same time for a subsidiary company, and we have been tracking website ranking info and search engine results for the company website since day one. It could just be that our SEO practices are superior for Google, but I have noticed a huge difference in our search results for Google vs. other search engines. I suspect that this is related to Google weighting the links from Google+, or perhaps just considering them at all while Bing, et al do not. On some searches, the difference was huge, a change from being a top two search result on Google to being a PAGE two search result on Bing. Obviously there is going to be some difference between the two search engines, but the consistently superior results on Google that I had not noticed prior to using Google+ make me strongly suspect Google+ is forcing the difference.
On a personal level, I've pretty much left Facebook and use Google+ almost exclusively, but not because it is better, per se. Most of my friends that use Google+ seem to view it as I do, a much more "exclusive" social environment. If you are a friend on Facebook, I know you. If you are a friend on Google+, you really are a friend. That isn't exactly an endorsement of one over the other, just an accident of timing.