VoiceWorks incorporates advances (e.g., "harmony hold" which allows you to sustain a harmony while you sing over it) introduced in the VoiceOne, which incorporated advances (e.g., more natural sounding "hybrid" pitch shifting) over the VoicePrism.

While the Korg PAX1Pro uses TC-Helicon technology, we don't which generation technology it uses. I would guess VoicePrism rather than VoiceWorks, since it is the VoicePrism that, like the Korg, accepts a voice-modeling add on. You might get something more advanced, but you might get something old or cut down relative to the top of the line products. We really need to have specifications, not just a brand name. Then, of course, we need it UD tested.