New product launch?

[MightyMart]

That was new to me, that I missed completely and I also were in contact with them about the upgrade process.

Océane Turpin at Devialet support tell me this today:
The whole electronics change, only the case stays the same. Even the serial number changes.

To me it would be strange if the chassi were also changed if they are the same in the Expert and Expert PRO, why would they do that without a reson?

The reason could be that it is probably more labor intensive and more expensive to retrofit existing chassis with new electronics instead of just producing new units in the factory.