With the caveat that the ‘tracking’ of any piece of pitch-shifting tech is subject to individual playing style, perception, etc….
The polyphonic tracking in the H90’s Polyphony algo is mind blowing. The OC-5’s ‘polyphony’ can’t touch the H90. But as far as I know, Polyphony will always shift the entire range of input signal, and cannot replicate the ‘lowest’ function of the OC-5 (“…the effect applies only to the lowest note of the chord…”).
Eventide – please correct me if I’m wrong on that…
As for the server/client question re: RC-5… H90 *can* send MIDI, so… maybe?