

So if you're after something specific using image searching, Google is better. However DDG doesn't include Pinterest spam.

G's image search is better - generally speaking.

Image searching is a little more hit and miss though. I've found DDG's results to be comparable to Google's and in fact in the last ~3 years of exclusively using DDG, I can count on one hand the number of times I've tried searching for something in Google after a failed search in DDG. Or if you're search for a restaurant, add in your home town too. Like if you search for a coding problem, add your computer language name to the search query. But that doesn't mean that DDG's results can't be as good as G's, it just means you need to add that context yourself. The thing with people who switch to DDG is, they do so consciously for privacy reasons but then forget that the reason G's results are so good is because they add little bits of context in through their profiling. It's not just a front end to Bing, like many assume (though I can't find DDG's article on the subject to directly cite). DDG already includes Google (amongst others) in its results.
