From my experience, for long-tail queries, DDG also a lot more NSFW results than Google. Bing does have the reputation of being better for NSFW searches than G

From my experience, for long-tail queries, DDG also a lot more NSFW results than Google. Bing does have the reputation of being better for NSFW searches than Google, so I guess that it's normal to have more NSFW false positives as well.