I have also been confused about Bluetooth Streaming vs. plain Bluetooth as i understood it
Advanced Audio Distribution Profile (A2DP)
A2DP is sometimes referred to as Bluetooth audio streaming
. This profile transforms your Bluetooth connection into an invisible auxiliary audio cable, enabling wireless transmission of digital audio to your car's audio system. Audio quality varies from case to case with a dynamic bit pool (or range of bit rates) being negotiated by the transmitting the device (your phone) and the receiver (your car) at the time of pairing. Generally speaking, we've found the quality to be good enough for compressed MP3s with only a few isolated examples of a noticeable quality drop.
HandsFree Profile (HFP)
This is the Bluetooth profile that is most commonly used and with which most users are familiar. This profile is what enables your phone to send its voice data to your car's hands-free system, a visor-mounted speakerphone, or a wireless headset, and receive input from a microphone
Bluetooth has become a Generic Term
It is explained so that we can understand it here