Apple Maps is technically a competitor I guess, because I work for Google Maps. When Apple Maps was released on September 19, 2012, it was a disaster. A famous one (source: *) . Mostly it was poor navigation, leading users down the wrong roads. In the many years since then, however, I've noticed Apple Maps getting better. Some say better than Google Maps!
Honeslty, it will depened on what you're trying to do. Google Maps actually has many features (like it's own review system) that are lacking in Apple Maps, but Apple Maps has some cool features lacking from Google Maps. Which is great!
On this page I focus on some cool features of Apple Maps I've noticed.
Apple Maps Desktop - Cool Features
Look Around Mode
3D Satellite Mode (high res for certain cities)