I know the cores are differnt and the Onslaught is a lighter load partical.. if anybody actually knows what the difference in reactions would be i would be appreciate it. I like the Onslaught but i am wondering if the herc would handle carry down better and or more oil.. I like the flip reaction I'm not big on the arc. I was thinking of going with a light polish on the onslaught and using it on my heavier shots. OR maybe a well polished mayhem is inline i don't know. NOBODY throws them around here, but i want a morich ball. whats the recomendations? Basicly i am looking for an oil ball that i can polish and use as a med heavy ball, or a med-heavy ball that will allow for sanding and handle more oil.. Either way they MUST take care of carry down on med-heavy