Imagine you have a pressure chamber which is divided by a removable wall in two equal parts.
Scenario A) Air pressure on the left side is 1 bar, on the right side it is 2 bar.
Scenario B) Air pressure on the left side is 10 bar, on the right side it is 11 bar.
The absolute pressure difference between the two sides is the same (1 bar in both scenarios). The relative pressure difference is greater in scenario A than in scenario B.
When the wall in the middle is removed air flows from the right side to the left side. Now, is the flow speed of the air the same for both scenarios or is it greater in scenario A? Intuitively, I assume the flow speed to be greater in scenario A (because of a greater relative pressure difference), but I can't back it up with a solid argument.
What is happening?