So, taking a look around I’m pretty sure these rebranded devices have modified firmware and modified version of the fitting software.
First of all they’re heavily customized. The custom labels on the HA and also the codes inside the HA!
So it’s pretty obvious that who built them (Resound most probably), built them for amplifon!
Second, it would be stupid to “lock” them only software side (Smart Fit). And how would they even do this practically? They have to detect the HAs and then decide that this one is rebranded and cannot be shown to the user. So the software have to do some calculation to decide this or consult some database of some kind. If so they would have to include this database in the installation since the software should work even offline.
Most probably the existing firmware is custom to Amplifon and the software is custom to Amplifon. This would make sense from a commercial pov too.
Moreover i found this link showing a computer screen showing some similarities to Resound Smart Fit software called Amplifon Smart Fit 1.0. This could be fotoshopped btw.
The same image shows at this video (https://vimeo.com/267131295) at time 00:54.
These are the photos of the heavily rebranded HAs.
The R 3 XQ stands for LinX Quattro and it’s inside the hearing aid!
So yea, I guess this is the end of story.
Moreover there are tons of these himsa documents one can find on google or by carefully searching their site, that mention some Compliancy tests and the list of software those tests has been run against. One can see in this example a “Smart Fit 1.9.0.169” and a “amplifon Smart Fit 1.9.0.125” so yea, there exists a customized version somewhere behind closed doors.
One can run some searches with “Costco Smart Fit” and find out those custom software exists too.
This user mention one btw : Why is there no discussion about Miracle-Ear hearing aids? - #22 by jay_man2
This fact is mentioned in DIY School for Costco as well.
… and those documents Doručování veřejnou vyhláškou - SÚKL clearly show that exists custom versions for amplifon, cotsco and this “CS Smart Fit” too
https://www.himsa.com/wp-content/uploads/2020/11/SmartFit1.9.0.169SolusMax1.9.0.139Audigy2.9.0.104amplifonSmartFit1.9.0.125IMCComplianceTestReport.pdf