Apple Maps is a reason not to buy an iPhone 5. Apple Maps shows much less detail and has much less contrast, what makes it very hard to use in bright daylight. For the street where I am located, only Google Maps on iOS shows the name of the street and the one way sign.
Screenshots from left to right: iPhone 4 with iOS 5.1 – Nexus S with Google Maps 6.9.2 / Android 4.11 – iPhone 4 with iOS 6.0