All questions differ in their power.
They differ in the depth they take a person to and they differ in their dynamic quality through time. A question can be more or less dynamic, more or less strategic, more or less actioning, longer or shorter levered. A water question takes the form of the container into which it is poured, but is not a form unto itself. I like to think of these question families as increasing in fluidity, dynamic and strategic power as you go down from level to level. In any use of the strategic questioning process, we would start near the top of the family order and work our way down to the more powerful question families.