It was a huge wakeup call to me when I got an iPhone this year how much better some of the Google Apps are on iOS:
-Hangouts is miles better, iOS had IP calling MONTHS before Android and the iOS version crashes less
-Chrome on iOS is better in a lot of ways, has handy gestures Android lacks.
-Google Maps is much much much more responsive, like crazy better
-Google Photos and backup seems to work smoother
-The Google Voice app on Android is ancient, but new and nice on iOS
And there are probably more. To me it makes it clear that iOS has better development tools, and that Google likes different teams competing with each other