Multiple IPSW for same version

Hi Team,

I just want to know the reasoning behind why there are two IPSW with same version and different build IDs.

Example: https://ipsw.me/iPhone12,3 Version: 18.3 BuildIDs: 22D64 and 22D63

Also, in future, on what devices this kind of two buildIDs will be created?

Multiple IPSW for same version
 
 
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