Net and drag force

In my opinion as they have different masses and the only force that is pulling them downwards is mgh, we can say that the W of the ball with a greater mass is 2Mgh and the other ball’s W is Mgh , as they have a constant speed we cant conclude that their F total=0 -->F-Fs=0 → F=Fs
So their net force is the same and it’s zero.
And as the F is equal to their resistance force, the ball with a greater mass has a resistance force of 2Mgh and the other one’s resistance force is Mgh , so their resistance force are different.
Hope the answer is correct.