Identify These Numbers: What Are They?

To which engine types do these two control units belong?
028 906 021 JH
028 906 021 GL
They are both engine control units.
Who can help?

And which specific Passat model is this speedometer compatible with?
3BO 920 847 E

021GL and 021JH are AFN engine control units (ECUs) from the Passat.

Best regards, Rudi.

Thank you!
And how can I tell the difference? Or can they all fit inside an AFN?