There is a big difference in damage that can be dealt between ZWJ and WYX because of the huge disparity in internal power. The gap between them is probably bigger than the gap between me and Mike Tyson. Even if you let me punch Tyson 20 times before he hits me back, I seriously doubt I'll be the one left standing after the fight. I'm not that weak either as I can benchpress about 200 pounds after working out for 2-3 months. Endurance is important too. I'm sure Tyson can take 10 times as much pain as I can. I also believe that ZWJ would be able to handle much more pain than WYX.