GTSK it's a pretty immature, uneducated thread for someone who is classed as a senior member. Have you ever been caught with a perfect punch? Have you ever been caught with a perfect punch from a man weighing in excess of 230lbs?
When evidence from their career as a whole suggests they both had very good chins, why even bother considering whose was worse? Seems like you're looking to start a bit of a pissy thread? Otherwise it would have been "who had the best chin" wouldn't it?