Thanks again for your help.
I am an iPhone user so the MFI system for the Oticon S1 was indeed a product I seriously considered. I believe the Bluetooth implementation on the Oticon is better than in the Phonak, as the Oticon uses Bluetooth LE and allows for multiple device connections, whereas the Phonak uses old Bluetooth classic and only allows for a single device connection?”
“That’s a really interesting point. The Marvel actually uses a protocol created by Phonak. True, the previous product used BT Classic. In actual fact, the Marvel can connect for audio to just about anything, whereas the Opn S can only connect to Apple. Furthermore, you can take calls on the ear with Marvel – with the Opn S you need to talk to the phone.
So I would say the Phonak system is superior. All other 5 big manufacturers use ‘made for iPhone’ – but Phonak created their own. I’m pretty positive about both products.”