Handlebar position between bikes

[jambee]

Hi there bike fit experts,

I've been wondering if there is a rule of thumb one can use to set handlebar height between bikes.

I have 4 different bikes. Three of which use 650B wheels with tires ranging from 42mm to 55mm. I also have two rides that use 700c wheels with 44mm.

When I built the largest tire size bike, the framebuilder explained to me that he set the headtube to a shorter value than the smaller tire bike. He shared that the goal is to end up at the same height of the handlebar between the bikes.

If that is correct, does it mean that for the same riding position,if I were to measure from the floor to the top of the handlebar, the measurement should be the same or very similar?

Looking to be educated.