I imagine that the one that did NOT ask was plugged in after the first was already plugged in and escribe remained running
Yes thats exactly how it happened

But it's been plugged in since, & still will not ask for an update? What are the chances 2 chips programmed the same day, & one has a newer FW?
Now this is even stranger! This is a SS of the Get info Tab on both.
I was wrong about the same day they were a day apart, but you can see when the Black one took the update the first day I plugged it in & the Bluish one did not

It would also seem these boards were newer stock being programmed rite around the manufacture date of these 2
mods
Further more you can see they're both at SP38 IN, So one came this way & one was updated?