It’s hard to get specific examples, but I was happier with the results back when I tried it in beta (after several years of using DDG exclusively and only very rarely needing the !g escape). It’s not always (pure default, things change with personalization like lowering/blocking/raising/pinning) a giant difference, but simply the result you want being further up, and fewer useless filler results between hits.
I tried Kagi for about a week, and it felt more or less identical in quality to DDG, just infinitely more expensive as DDG costs nothing.