I have used both Moryde and the 5th abn, the advantage of 5th abn is that it dampens both the" bounce" and "shuck. " Moryde dampens only the" shuck" and as far as I can see the demco only works on the "shuck. "
I have the 5th Abn on my 14,500 lb Jayco and could not be happier,I have traveled on various tyes of roads for the past yr and as far as I am concerned it can't be beat.