To me it is on the Benelli. I don't know how much the comfor tech does, but I can tell it's better to me. What I really like it the soft comb. That does wonders with heavy loads and head slap. I shoot the M2 and love it. I shot an M1 a few years ago and hated it.
That KO is sweet if you shoot a lot of heavy 3 1/2" loads, but I had and Xtrema 1 and recoil wasn't an issue with that gun at all. I shoot an 870 and 3" loads most of the time and I don't notice the recoil when hunting. I have a Limb Saver on my sup. mag 870 for turkey hunting and that really helps on the recoil. The KO is great and it works, but if $ is a problem and you can’t swing it I wouldn’t pass on an xtreama without the KO.
More ammo! I need to shoot something!