I think any inferiority is mainly because DDG doesn't build a user profile. I tested this the other day by searching for 'rust'. On Google the entire first page

I think any inferiority is mainly because DDG doesn't build a user profile. I tested this the other day by searching for 'rust'. On Google the entire first page of results were either about the programming language or some game. DDG had something about iron oxide as the third result. Whenever I use DDG, I just have to remember that DDG does not have my personal profile, and adjust accordingly. Then the results are fine, and even better if I'm searching outside my normal profile.