Prior to the uproar around IOS 6 maps not having Transit direction, I wasn't even aware the IOS 5 Map had transit directions. In San Francisco, Tokyo, New York and other places this is a big deal. But, if you want to get Transit Direction from Redwood City, CA to Oakland, CA, IOS 6 Maps currently beats out Google Maps.
With that said, I'm blown away by how quickly the interface can guess what I'm looking for as I start typing into it. Apple has a long way to catch up in that department. I suspect for much map searching, Google Maps is going to become my "Goto" client on the iPhone.
[Edit - Love the speedy Swipe Left/Right interface. Also Offline Maps. Just Cached all of California, Switched to "Airplane Mode" - and all my mapping data is cached. Awesome.]
[Edit 2 - Wow - this map is fast. IOS 6 Maps wasn't particularly slow, but switching back and forth shows me Apple has a long way to go. Have to Love Competition]
[Edit 3 - Jumping into StreetView is silky smooth, and, they make use of the accelerometer so you can look around]