Agreed. I live in NYC, and every corner has been completely mapped, and it's a level playing field for almost every mapping tool that's out there. Google isn't competing on completeness of maps, but rather on transportation data. Subway schedules, route changes/delays, traffic, and construction data all matter a lot more to me than actual geolocation. And in NYC, streetview is enormously helpful.

In many parts of the world, basic mapping data is incomplete, and one tool will have fresher data than the other for cherry picked examles. In another 10 years, we can imagine that mapping will all be relatively similar, and integration is what we'll compare against.