Originally Posted by
eduskator
Has anyone ever wondered / found the answer or am I the only bored cyclist in the world who has time to think about these things?
Yes / No / Yes.
Doesn't matter. That and the pressure gauge on the pump will never be the same as a hand pressure gauge because none of them are very accurate. What's more important is precision, not accuracy.
Pick one gauge and one pressure you like and stick with it.