I think it's determined by the same base pkg, because when I did that 60fps mod to my own bloodborne patch, I didn't have to repack the pkg. I did when redumping my games though, so the same dump from the same game, same system won't require a repack, but a different dump of the base pkg will, even if it's the same game, same system. I'm not sure if it's related to the fingerprint or the digest, probably one of the two. though, the fingerprint is related to the passcode, which you can see in orbis, so theoretically, all fingerprints should be the same, shouldn't they if all passcodes are 32 0's? unless it's random (not sure on this as I haven't tested it).