Hi, Dapeegoo! I wrote the code of the pitch shifters, so I think I can answer some of your questions.
The pitch shifters are polyphonic, and they don't track the note you are playing. Only the Harmonizers are monophonic, because they do a monophonic tracking of the notes. The latency varies with the plugins, if I'm not mistaken, with a buffer of 128 samples and a sample rate of 48kHz (MOD Duo configuration), the lantencys are:
Drop - 18,67ms
Capo - 29,33ms
SuperCapo/SuperWhammy - 40ms
I don't remember the latency of the harmonizers, because the tracking adds an extra latency. This values maybe have changed, because other members of MOD team are still maintaining the code and making it better, since I left the team.
I've never used a POG2, so I can't compare their pitch shifters with the pitch shifters I wrote.
I hope I've helped you with something