No side-by-side access to the newer EHX or Digitech hardware; only pedals & racks from a generation or two back. Plugin-wise, I’m calling Polyphony my Melodyne-in-a-box, if that helps any.
As for the conversation above with gas hed, yes, there is a boost with using both Pitch A & B simultaneously. I neglected to mention that I dial back the A&B Levels to around 80-85 to gain-stage Active / Bypass. I also like to pan each side with a tiny bit of Detune (like +/- 1c). Out to stereo, so I haven’t mixed that down to mono for comparison.
That setup may play into why I’m not getting the ‘warble on decay’ mentioned. That said, I do use the Inst Type as a general starting guide, like the H910 / 949 splicing options in the H9. Final choice of Percussive or Pitched depends on the application and ears.