Could be wrong here, but I cant see it being as good sonically, as your ysp1100 or my ysp1000 for that matter. I originally was considering the smaller (less drive units 24 opposed to 42) ysp800.
At the time the price difference wasn't that great but listening to both in the shop, there was quite a big difference in performance so walked out with the bigger ysp1000. Conclusion with this technology size does matter, and hence why the sub, which probably handles some midrange as well, possibly similar to the Wharfedale PPS1 nxt system.