The main difference imo, is that in the era of the enforcers, playing a foul game came with a higher cost, and demanded more from the guys doing it. Samuelsson, Barnaby etc were willing to pay the price in order to do their "thing." They both got beat up pretty badly at times.
Enforcers won't prevent guys like that from doing foul things, but they will prevent the softer pests that we have now. I can't see guys like Luke Kunin running around in the days of Domi and Probert. I think it will also deter cheap shots and antics from the average player. Nowadays you see suspendable hits from a wide array of players, from soft to tough. All the soft to semi tough ones would probably think twice if you had Domis in the game.