Logic?
RAT 5 Quote :- "Why did Airbus make all their overhead panel switch opposite to Boeing?"
RAT You could also have asked why did Boeing make all their overhead panel switches opposite on different Boeings?
At the same Company, we had Boeing 720s with the opposite switch logic to the Boeing 707s.
In those days perhaps it was the customer's choice. The aircraft were obtained second-hand from two different operators.
As for your Airbus question perhaps it's a case of "Vivre la differance!"