I had this same problem once I changed the bottle on my Impact Compact from 300CC to 480CC for shot count. I have many moderators from different manufacturers, Hugget, DonnyFL, Silent Thunder Ordnance, 0DB, etc. I have sound that the 1.22 diameter moderators reduce the sound as good as your 1.6" moderators. I hear no difference in DBs between the Sumo, Ronin to the Hugget snipe and Koi. The sound that is produced I would say is better than the Sumo or Ronin and is more soft and less "snappy". But, your tune (amount of air being pushed through the barrel, barrel length) will also affect that. Prior to changing out to the Hugget Snipe Standard 1.22" I had the Silent Thunder Ordnance Sarrissa on the rifle. That was the most quiet moderator I had, the Hugget is marginally louder, but the sound left over is rounded off and not sharp, which I actually appreciate more than the actual sound reduction. The Koi has slightly more sharpness to the sound, but again, marginal. This of course if to my personal ear, my tune, my neighborhood layout for vegetation and homes, which affects the report back to your ear no matter the moderator you use. When I am out hunting, with less environment interaction on the sound, I am still very satisfied with the Hugget, I would say slightly over the Koi, but not quite as satisfied as the Sarrissa. Overall happy with the 1.22" Hugget.
