If I get the "DA" option, I understand it has the Remote Touch controller, bluetooth, USB connection, but it won't have Enform App Suite (iHeart radio, Yelp etc.) correct/

But if I connect my iPhone through USB won't I see that on the display screen? or not?

Is there any diff between connecting iPhone with Bluetooth vs USB? Both stream, correct? What does USB connection do that Bluetooth doesn't (besides charge the phone)? Thanks