Competition and all that. Google Nav is the easy slam-dunk choice on Android. Still, I'd be shocked if whatever's so great about this new iOS version didn't make it to Android in short order.
Google nav freaks up at the worst times. It directed me to a bus stop when I was looking for a restaurant. It reset when no cell signal was available and wiped all the directions out while I was on a highway. It directed me to a house instead of my dr's office when I was late for a procedure.
I downloaded Waze but there's some privacy issues so I never activated it.