I mostly agree with the "doctor" on this. Having had 2 Revenges and seen a friend use the Mystic this summer very successfully, my feeling is that the Revenge is half way between the Mystic and the Venus (I have the Venus).
The most similar particle pearl ball around today may be, that is, MAY BE, the Uturn Particle Pearl.
There are, however, more than a few "plain" resin pearls that may be more similar to the Revenge. The current crop of resin pearls are relatively strong compared to those during the Revenge's era. Some potentials are the Horizon, Radar Lock, Rampage, Equation, T-Road Pearl, Toxic, Ogre Black/Purple Pearl, Lane#1 Evolution, The Buzz.
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"None are so blind as those who will not see."