There may be connections on the circuit board to allow new buttons to be added, like with the new Type B unit. Anyone have a photo of the circuit board?
The Pioneer unit has fully integrated Bluetooth. It also has a backup camera input, which allows you to see the image while driving, iPod interface, 2nd zone audio/video output for rear seat monitors, and a lot of other nice features. It allows you to look up and address on a smartphone, and synch it to the head unit. Pretty nice NAV system, too.
Everything has voice prompt control, too.