I was using ddg before recently switching to runnaroo for a couple of months now.
Runnaroo seems to always surface wikipedia, stack overflow and github which is almost always what I'm looking for. And if it's not there a quick scroll to the bottom gives me a Google link I can click.
Like others, using ddg previously have trained me to add !g automatically meaning I almost never looked at ddg. I can still add !g to runnaroo but since i know google (or ddg) is just a quick swipe away I never type it.
I would definitely move back to ddg (anything but google) if I ever have a reason to stop using runnaroo.