Where did you get those numbers? As far as I can tell, more that one hundred cities have textured buildings in Google Earth (they were created by building maker https://www.google.com/intl/en_uk/earth/learn/3dbuildings.ht...) as well as in mobile maps (http://www.google.co.uk/mobile/maps/3d/ my city has 3d outlines and it's not even in the map). Apple maps too should have at least 40 cities in 3D.

All things equal, Apple doesn't support any cities yet since their mapping program hasn't been released.