Difference between black case M4 and gold Case M4

Hi... I purchased today a Black case M4 ecu without really thinking about models.
it is apparently is
version 4.5
fuel and ignition
sequ & 3D
Advance tune
How does this vary from the gold case, if at all?
Is there any instructions out there for this specific ecu?
it is apparently is
version 4.5
fuel and ignition
sequ & 3D
Advance tune
How does this vary from the gold case, if at all?
Is there any instructions out there for this specific ecu?