I think you’re looking at wrong direction. Marketing department. Otherwise, what would they offer with next line (paradises)
Also, afaik you don’t need to ‘forget’ HAs on some device, you just need to pair to new device, the old pairing will be forgotten in aids automatically, no?
Nope.
LE is used for remote control, and each aids has own LE connection.
For streaming BT classic is used, master aid connects to the source, and slave aid will get the signal through the master as a proxy.
Then this BT connection has 2 protocols - handsfree (headset = the one with mic), used for phone calls, and media streaming (headphone = without mic). In some devices you can actually choose which BT protocol to use, like my smarthphone can be connected to one, both or none, depending on what I want - notifications kicks media stream, so if you don’t want to hear them ,you have to shut down media stream.
Also, headset is common name for headphone+mic no matter if one or two ears, and most popular headset is voyager legend, and you’ll notice that this thing is single side, whereas marvels are binaural
Or you put something over them when you’re streaming, or even on the canal like this
https://smile.amazon.de/gp/product/B003H4T0YS/
I think main reason are the different drivers. Those from dongles seems to cover something better than those for built in BTs.