Who makes a better Soldier, US Marine OR Australian Commando ?

After my experiences working on a Military Base in Sydney (Holsworthy). I witnessed the gruelling testing and training regimes the Australian 4RAR Commandos were put through, prior to being relocated to Darwin, as an Defensive tactic against the hostile North. I witnessed Companies of US Marines, both great Soldiers, but constantly and vastly out sourced and out matched by both 4RAR Commandos, 3RAR Para. Theres ABSOLUTELY NO COMPARISON with Australian SAS. However given 4RAR Commandos are infact the basis of the "Special Operations Task Group" in Afghanistan, does this fact alone mean Australian Commandos are far Superior to US Marines ? What do you think ?