Emulator III vs EIII rack, XP,XS etc

[Sithspawn]

Hi guys, this is my first post and I'm curious to know the differences between the original EIII keyboard version vs the EIII rack version.  I know the XS and XP are sample playback versions that can be upgraded to be full fledged samplers but i assume the EIII rack is pretty much the same as the keyboard version.

My main interest in it's analog architecture;  do all the variations have the same VCA and VCFs that the original EIII has?

Many explanations in the differences are more about the total voices, polyphony and the hardware differences and capabilities rather than what I'm interested in.

Thanks in advance if anyone has knowledge about this.