Hi,
I've had a Kick-EEZ on one of my shotguns for a couple of years, and shot a few boxes thru a buddy's shotgun w/ a Limb Saver. The difference is probably pretty subjective, but I think I'd give a TINY edge to the Limb Saver. Have only fired three or four rounds w/ a Decelerator, so can't say one way or the other about it.
Rick C