Ok then point taken.. So given that everything is equal apart from bat mass if we hit the ball with the exact same bat speed with both bats then which will hit the ball the farthest???
If we apply the same amount of acceleration to the bat in the swinging arc, then a bat with greater mass will apply greater force to the ball.
However, we as humans have a maximum force we can apply given our strength and unless we are extremely practised, we should use a weight that allows us to swing the bat optimally providing the greatest acceleration while also allowing us to control what we are doing best.