Can the Roger On be used with different Phonak hearing aids?

No they will pair with any Phonak hearing aid since the Marvel as long as it has Roger receivers (essentially a software license) installed.

You have to have the Roger licenses installed in each pair of aids you want to use the Roger with before you can pair them. If you have the Roger 3 you can just transfer another set of licenses to the second (or third) pair of aids. If you have a previous Roger version, you can add licenses to the Roger to be transferred to your Lumity’s by downloading the free Roger Upgrader sofware from the Phonak website.

Roger Upgrader Support| PhonakPro10

Roger Upgrader is designed to ensure the Roger compatibility of Phonak devices, such as: wireless microphones, loudspeakers and multimedia accessories

Thanks guys for the enfor!