The Plazma coverstock is actually MUCH stronger than what's on the Copperhead. However, that being said a C-Head at 500ab can handle a good amount of oil. The Maxxx Zone I find to be extremely strong and rolly. So if your looking for that extra little kick in the back the C-Head might be the better choice. I typically use my Maxxx on FRESH heavy conditions, say 1st game of teams at Nationals, however I find that once the heads go dry up the slightest bit, i have to put the Maxxx back in the bag. I typically have hand scuffed it with a dry 500ab pad before bowling.