Based on a test Dr Dave ran for us awhile back hardness has a minimal effect on deflection... However elasticity may and it has not been tested yet.... I think that our soft has the most dwell time on the tip and that may mean that the cueball follows the tip a tiny amount closer to the line....
I use the soft and it seems to overspin the ball at slow speeds to the point that you have to consider swerve... The medium at slow speeds is neutral and the hard still has a slight amount of deflection... Since hardness has been removed then COR.. Elasticity.. and rate of rebound may have a place in the equation.....
In a nutshell by my experience the soft performs everything but the high end speeds exceptionally... The medium may be the journeyman as it fits normal rotation game speeds very well.... and for the guys that force the ball around the table and never slow spin balls the hard will let you get the cueball where you want with speed alone......
I use the soft and it seems to overspin the ball at slow speeds to the point that you have to consider swerve... The medium at slow speeds is neutral and the hard still has a slight amount of deflection... Since hardness has been removed then COR.. Elasticity.. and rate of rebound may have a place in the equation.....
In a nutshell by my experience the soft performs everything but the high end speeds exceptionally... The medium may be the journeyman as it fits normal rotation game speeds very well.... and for the guys that force the ball around the table and never slow spin balls the hard will let you get the cueball where you want with speed alone......