Board Thread:Fun and Games/@comment-7823447-20130703174114/@comment-24752738-20140331003408

Diamondhead isn't indestructible, as proven when Ultimate Echo Echo was able to make him start to crack and shatter, but since my instinct says he's harder than Chromastone, that means Chromastone isn't either.

Infinite tie, as I'm too lazy to think about it too much. If forced to make a choice, I'd say after a long battle Chromastone would win, as he can fly and eject energy.