The Verge has a great comparison shot:
Stephen Hackett at 512 Pixels:
The new iPhoto for iOS does not use Google Maps. The tiles brought up when you use the locate feature of iPhoto, in order to display where the photo was shot, almost definitely do not have the traditional Google Maps in the Maps app of iOS.
The new map data appears to be active only on the new iPhoto for iOS app that Apple released today. You can view a map tile that is being pulled directly from Apple servers here.
I think this is a much bigger deal than it appears to be.
Related: Foursquare ditches Google Maps
Update: John Gruber “asked” and was told that the maps are still from Google.