It depends on the city. In Melbourne, Australia for example I find Google Maps to be less accurate than Apple Maps. I also found the same in parts of Tokyo.

It's also great in Switzerland. And got improved in Serbia. Great for Austria, Italy and Germany. Europe is not that bad. For me way better than Google maps (especially for car navigation)

That is not true, Apple map is better than Google's in China, better than Baidu at navigation even. It uses a local map provider's (amap.com) data of course.