I do not know specifically as I have not read Apple Maps policy but to choose Apple Maps over Google Maps says a lot. I use google maps personally. Apple maps is getting better, but it's not google maps. So one can assume, the choice to choose apple over google means, IMHO, is that with Apple Maps they do not track as much as google would/does. Apple stance on privacy, publicly, has been pretty good. Tracking is everywhere and DDG still is sticking to their privacy first method.

Lastly, I love that I can dump random searches from my weird brain into DDG without the feeling that I'm giving some random machine, data that at some point can tell someone what I may want or do or have searched. Everyone knows what you're doing on the toilet, everybody poops, but we still close the door for privacy.