Costco Phonak Brio 4 (Product Information)

Hearing Aids
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56

Thank you. Looking around that seems to be the major difference between the two.

https://forum.hearingtracker.com/t/phonak-marvel-vs-phonak-naida-s/45837/5
https://forum.hearingtracker.com/t/phonak-audeo-marvel-vs-phonak-nadia-b-sp/43533