You can definitely connect more than one phone. There's no labels to it though. Whatever phone connects first gets it. But if its for when you guys switch around vehicles, each of your phones would be able to connect.
Yea, what he said. No favorite though. Wife has iPhone I have Android. If we get in the car together it defaults to which ever phone was connected last. To switch to the other persons phone literally takes less then 5 seconds (unlike my Volvo which takes WAY to many clicks).
The system connects to the first phone it sees. You can manually switch between phones. The phones connect to two different Bluetooth profiles. One for phone, one for music. You can even connect to different phone for each profile. Disclaimer, I have a '14 so I don't about the New Infotainment system.