This is a question of some interest lately for me. I even wrote a small section on this for a new eBook I have just finished on curation for B2B content marketers — it will come out early next month. But, I did not have much to say and just put the content in the search and SEO section.
Certainly any comparison of Google vs Bing will tell you that Google still dominates. But, Bing is actually gaining ground. However, this is at a great cost to Microsoft as it continually operates at a loss. Some even say they are buying searchers though advertising and partnerships at a great loss. This does seem to be true, and thus I wonder if they can or will keep this up over the long haul. After a while they may have to cut their losses. Or in Microsoft’s case decide to chase after the next shiny object that is trending and analyst are saying will eat their business — seems to happen often.
In my opinion, and I hear this more an more, that marketers should give Bing a chance. If for no other reason than Google needs some competition to keep it from leveraging its near-monopoly to much — ironically a page out of Microsoft’s play book.
According to the recent Article, ” Why You Should Give Bing a Chance for Your Content Marketing“, Bings numbers are on the rise.
While Google is still the clear leader (currently at 66.8 percent search market share according to comScore), Bings search market share has been gradually rising (15.3 percent in March, 15.4 percent in April/May and 15.6 percent in June), and if you include the sites that are powered by Bing (which include such prominent sites as Yahoo!, usa.gov and nbc.com), then it has a respectable30 percent share. However, Google and Bing are nearly tied with regard to consumer satisfaction (Google holds 82 points while Bing holds 81), according to the annual American Customer Satisfaction Index.

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Also, a bonus infographic on Google vs. Bing:









