Hmm, I have just had a look at the GS-V "abundance of Harmonics" instrument preset, in ST4
It consists of 1
Element with 1,495
Zones, with 8 or more Zones per note and 2
Oscillators per Zone. That could mean 1,495 x 2 different samples. And maybe each of those 1,495 samples are a Wave Set? (After all, the samples .pak file is 103 MB.)
In ST4, each Zone can have a different Amp Env, Pitch Env, Filter Env, Zone LFOs and Filter! As well as different Oscillator settings. If you edit the Element then the settings in all 1,495 Zones are edited.
In Syn2, as far as I can see, Zones are not individually editable. So I wonder what the target of the Zone LFOs is. They seems to be other zone-related parameters. And, from some brief tests, Zone LFOs affect All Zones in the Element. Element LFOs also affect all Zones in the Element
and can also target element-related parameters.
I think that the difference is that Zone LFOs start each time a note is started and Element LFos are free-running (independent of any note start). So if you play 3 notes at slightly different times, then the Element LFOs will run together and the Zone LFOs will start and run separately. But I could be wrong.