Where are the product code and RM number for Lumias?

[Skamath]

Product code and RM number for Lumias

What is different between the firmware and hardware for country variants and postpaid Lumias. In specific A CV L1020 and DE O2 64GB L1020 postpaid.

I am aware that the storage capacity is different but both have the same RM-875.

Does anyone know about the changes if any that O2 has asked for from MS.
German O2 has Denim OS version 8.10.14176.243 Firmware version 3051.50009.1424.0004
AU CV has Cyan OS version 8.10.12393.890 Firmware version 3051.50009.1424.0007 and
under PfD I have Cyan OS version 8.10.14219.341 Firmware version 3051.50009.1424.0007
Between O2 Denim has higher OS ver compared to CV Cyan. I get that is updated but the FW of the O2 is pretty much what was to be with Cyan. So when the "merged" the updates the FW side was left to what the rest of us got under CYAN while it got OS ver higher than what the rest have under Cyan.

To Make it even more interesting while the thought crossed my mind to get Denim thru german product code and flashing I noticed that the firmware version remained the same, which led me into asking if there were bits missing from the German O2 update release.

While going through the net to find out more I stumbled on to this Link

Unsure how credible the claims are but there are more knowledgeable people here then me who can help clarify this.

Cheers
S