I apologize if I seem 'late' to this topic...
I can state that I have a P'08 and a REV2 (Rack - 16 voice) - and also Razmo's soundset for the REV2. Which is quite good, BTW.
I'm selling the rack REV2 16-voice soon (PM me if interested - only reasonable offers will be replied to).
I've found that:
- The P'08 has much more low end. And comes 'alive' with a good reverb, like the Boss RV-500 that I have
- I don't need the other FX much, they tend to diffuse the sound and 'muddy' it
- The additional routing options and wave shaping require much more attention to detail (effort), for questionable gains
- The LCD display is nice, however it becomes much more confusing to ferret out 'what controls what' without constant reference
- The 'sequence' options are REALLY hard to ferret out without the LED' s that the 'keyed' version has (mine is the module).
Summary: Part of this assessment is that I'm just 'old.'
I have a Kronos 2 also - and I love my DSI P'08! But I don't see much 'value-add' with the added expense of the 16-voice REV2 module, and all it's trimmings - that I can't do with similar or less effort on the Kronos 2 and P'08 'knob-ages.'
All of the aforementioned, is strictly my own experience and opinion - and nowhere near exhaustive, of the capabilities of the mentioned instruments. I go on record as a forever Dave Smith/Sequential fan!!!!