You won't find anything 'conclusive' in the discussion threads because it often comes down to a personal comfort choice, in amongst other trade-offs. Personally, I went with the Sennheiser S1 digital because I wanted a headset with very good passive attenuation and failsafe operation (flat battery just means reversion to passive mode). Because I fly a few aircraft in different configurations (canopy open/closed, etc) I also find the selectable ANR optimization of the S1 to be useful in getting the last few dB attenuation in a particular configuration. Last but by no means least, the S1 fitted my ears and head comfortably, with the accomodation of the spectacle frame arms a bonus.
If you can possibly manage to try out the headsets on your shortlist, you'll be doing yourself a favour. My ranking from the cockpit trial was quite different to my expectations and I made sure I took my faithful old DCs along as a reference.