Let's try something new: Let's give examples. I'll go first:

Let's say I have a nebulous recollection that there is a wifi module with "NRF" in the model number. If I search for `nrf wifi` on both Google and DDG, which do you think provides better results?

Let's look at the top URL hits from both (this is in an incognito window, with ublock origin on!):

Google:

1) nordicsemi.com (the manufacturer) homepage

2) <manufacturer website> press release

3) <manufacturer website> random Q & A page

4) arduino.stackoverflow.com (question about how to use it)

5) Some blog (someone's guide to using it)

6) nrf.com (National Retail Federation) conference category: wifi and bluetooth analytics (unrelated result, but I can imagine someone going to this conference might google the exact same thing, good thing Google knows to show it...

--- A random box showing questions relevant to the device ---

7) arduino.cc (question about how to use it)

8) <electronics blog site A> (someone's guide to using it)

9) <electronics blog site A> (another page on using it)

10) <electronic parts retail site A> (sells it)

DDG:

1) <electronics blog site A> (someone's guide to using it)

2) <electronics blog site B> (someone's guide to using it)

3) <electronic parts retail site C> (someone's guide to using it)

4) <electronics blog site D> (someone's guide to using it)

5) <electronics blog site E> (someone's guide to using it)

6) <electronics blog site F> (another guide to using it)

7) <electronics blog site G> (someone's guide to using it)

8) arduino.cc (question about how to use it)

9) <manufacturer website> random Q & A page

10) <manufacturer website> another random Q & A page

As you can see, Google seems to prefer authoritative sources (the manufacturer, the conference that coincidentally has the same name and category), while DDG seems to prefer blogs and how-to guides. I won't say which is better, that's entirely subjective.