Hello again,
I am looking ast G09.pitchshift.pd and am failing to see the exact differences between this and granular synthesis. Is it merely an implementation of granular synthesis?

G09.pitchshift.pd as I understand it is emulating an even older hat in audio tech, namely the rotary tape head pitch shifter. Explanation here: https://valhalladsp.com/2010/05/04/pitch-shifters-pre-digital/

It just so happens that this technique is a subset of what you can do with granular synthesis- and the digital implementation is using some of the same tricks as granular synthesis (splicing, window fading, etc). So your observation is correct in the same way as "A radio tuner is a filter".

@bocanegra Thank you for the link. It does seem to me to be an early version of "granular synthesis."

Yes but the point here being that digital granular synthesis does a lot of other things controlled by you: time stretching, jumbling up grains at your will, reverse playback and whatnot - the pitch shifter uses grains, delays and windows for one single purpose: shifting pitch

If you are doing a full fledged granular synth in PD the patch in question provides some basic technique,s but not as useful as you might think as it is designed for pitch shifting only. Pay attention to what @ddw_music told you in the other thread: https://forum.pdpatchrepo.info/topic/13489/realtime-detecting-lack-of-correct-delay-in-the-delay-object/11

Another note: Granular synthesis works with pre-recorded samples, whereas the pitch shifter is real time pitching

Good points