Difference of the BIRDVIEW™ screen from the flat map screen are as follows.

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

The current place name displays names which are primarily in the direction of vehicle travel.
The amount of time before the vehicle travel or turn angle is updated on the screen is longer than for the (flat) map display.
The conditions for display of place names, roads, and other data are different for nearby areas and for more distant areas.
Some thinning of the character data is done to prevent the display becoming too complex. In some cases and in some locations, the display contents may differ.
The same place name, street name, etc. may be displayed multiple times.