Haha. This will just create a new arms race for rubber manufacturers. Use a 2.0mm sponge with a new type if booster so that it does not exceed 4.0mm with topsheet but booster effect is still giving extra performance.
I think their spin is equal, it is just that the Tau II is easier to use. Even if you smash with it, it still can smash effectively. I think the bs h3 has a lower arc after bouncing.