Considering everything caught in my Fist of Havok dies when I hit it, everything is the same in terms of distribution. This can be most observed with the Aftermath effect in which FoH leaves an Arc field in it's wake. Anything that walks through it also tends to die regardless of position to the epicenter. Understand that your Super is more or less or you OH SHI- panic button designed to give you some breathing room. This means it cannot be subject to anything such as damage distribution because it's supposed to allow you to one shot clean house to keep you from being overrun. Only Majors and Ultras might survive it out of sheer endurance and armor level since they're specials but that's them being special cases.