Anecdotally, both Google and Apple maps have fail points. Up until very recently I would always try to double check Google Map's pin of a location from another source because it would be flat out wrong at least 10% of the time.

The more interesting thing to me now is seeing what OpenStreetMap and Mapbox are doing. Their combined trajectories may end up surpassing both Google and Apply. Mass produced drones along 3D scanning tools and improved 2D->3D imagery tech could provide for very comprehensive and open map data with all kinds of layers of usage far beyond geo coordinates, lanes, and street sign data.