Klematch are the most expensive, and are the best cushions for responsiveness, and true bounce for banking, meaning the ball will come off the rail on its true angle.
This makes the pockets not so readily except the balls as we see on 9' Diamonds when the rail is contacted prior to the pocket.
The balls will bank truer, and will not reverse coming off the 2nd bank rail like it does on Diamond Artemis cushions or any of the other cushions available.
A true perfectionist of the game, and a player that does not want double banks to be compromised, and wants pockets to play tough would then want Klematch. 4-1/2" pockets on Klematch cushions would play plenty tough, but Diamonds have to go to 4-1/4" to toughen up the pockets, as the ball contacts the rail before the pocket.
I think Steve will agree with this depiction, for he has played on Klematch. He does not like them for some unique banks that really grab reverse coming off the 2nd bank and thus are doable, are not doable with Klematch. Like the cross over from side to side pocket banks. The banks will not shorten up as much either.
I would get a professional opinion on this before investing, I am not a professional when it comes to cushions, and am mainly surmising but no one else has mentioned these cushions.
Whitey