LimbSaver, hands down best recoil reduction from a fixed pad.
They should have a pre-fit model for your gun, unless the stock has been modified, then you'll want a grind to fit pad.
Pachmayr Decelerator pads do offer a hard piece for the top of the pad built in to reduce clothing hang up when mounting the shotgun that works well. Good recoil reduction too...just not as much as experienced with the LimbSaver in my experience (I have several of each make on my firearms).
I have a Limbsaver "Airtech" (or somthing like that) on my "moosberg" 12 ga. I would say they do work well for recoil reduction. However, the material of mine is "sticky" and catches on clothing. To the extent that I wrap the edges in blue painters tape to help it "slide" before I go hunting. Otherwise it works well. CL
I have Limbsaver and Pachmayr and Kick-EEZ all are good recoil pads Limbsaver is the hardest to grind to fit. Kick-EEZ are soft and gun needs to be stored muzzle down. Pachmayr Decelerator are excellent as well.
Now on my hunting 1100 3inch Mag I have a Limbsaver. On my 1100 and 11-87 Trap Guns I use Kick-EEZ and on my 1100 28ga I have a thin Pachmayer Decelerator for a longer length of pull.