Do you want to compare John Grey with Iron Fist? Discover the powers, weakness & weapons of John Grey and Iron Fist from John Grey Biography and Iron Fist Biography. Find out all about John Grey and Iron Fist.# Check out how is John Grey unique and distinct from Iron Fist. Discover their love interest, sidekicks, family tree and the movies and games list in which John Grey and Iron Fist have appeared. Find out everything about them here!