Jose Luis,
I am not sure if I understand you... AP models do not change upon firmware upgrade. If the AP model is, for example AP7522E (as the one you have in the picture), after upgrade it will remain to have the same part number. In an RFS environment, you will not be able to adopt those APs independently of the version they are running as we do not have RFS EXPRESS controllers. An easy rule of thumb:
AP7522E - Will be adopted by VX9000E, NX7500E or NX5500E
AP7522 (Enterprise Model, no E in the part number) - Will be adopted by any RFS, NX or VX enterprise controller.
Hope this clarifies.
Kind regards,
Daniel.