fw 190a5 flight model

[MaxGunz]

If you don't take into consideration what the takeoff speeds, runway lengths and air density are then you won't get much out of takeoff weights.

It's like when The Joke would say that more weight on a plane makes the plane faster because hang gliders fly faster with ballast. Yes the gliders do, because if they don't fly faster they will stall when the unballasted, slower glider is still not stalled.
But -powered- airplanes don't get their energy from their weight, they can go faster using the spinny thing up front. More weight just makes their wings have more drag, which BTW is not proportional to wing loading.