Phonak owns Unitron.
Although the Unitron aid designers haven’t (yet?) joined the Phonak team they all share the same chip platform.
This means that Passport and Exelia/Audeo YES are going to be very similar in style and function.
Go for the Audeo YES if you want small size, 312 battery and NO telecoil.
Go for the Passport if you want an ‘Audeo YES with a telecoil’.
Unitron products are also usually cheaper than the Phonak versions.
Do note however that a size 13 BTE such as the Passport is going to be ‘fatter’ than a 312 BTE such as the Audeo.
Also, check out the on-board control of the Unitron … the dinky little push button is not for everyone.
Finally, I like the Phonak myPilot LCD remote … but I’m not sure if there is a new Unitron remote with a similar LCD etc.