But which is more accurate google or bing? Having used DDG (~bing) for a few years now, at first I felt it was inferior, but I stuck with it for the privacy. Now I feel it's roughly equal, depending on the query. Google is full of spammy SEO content, where as DDG elevates niche content (probably more because it's not targeted by SEO spam, but I'll give them the benefit of the doubt)

I feel it's somewhat impossible to discern accuracy in search results, as you can't see what's missing. But by the time you feel the results are missing something, they're likely missing ALOT.