User blog comment:BronxZilla/Green Berets vs UNSC Marines/@comment-181289-20120712213708

UNSC Marines take this. There weapons don't appear to have change much, but they have infact changed, making them more reliable and are generally improved versions of the the Green Berets weapon. Also the UNSC Marines have better body armor, which works extemely well against Ballistic weapon, with gel layers to absorb the impact of the ballistic weapons. Also they have experiance fight Enemys much more terrafiying and deadly than th Green Berets, the Jiralhanae, Sangheili, Mgalekgolo and the Flood.

There Body armor and weapons are simply better. I find the "Green Berets ae better Trained" argument not all that great the UNSC Marines are decribed as "The Best of the Best." And the Term UNSC Marines could used to refer to any member of te UNSC Marine Corps, so I could even make the Argument that these could be ODSTs vs Green Berets, as the ODST are part of the UNSC Marine Corps. But I assume you mean the standard Marines, but even then, the Standard UNSC Marines are still Highly trained and better equiped than the Green Berets.

There is a misconception that the UNSC Marines are canon-fodder becasue of game play in Halo means they die farily easily. But this is only meant to make the game more challenging, and not a accurate representation of the Marines skill, if they died as easily as they did in the game, the UNSC wouldn't of been able to hold the Covonent off in land engagments as they did, Halo Wars shows the "normal" Soldiers of the UNSC are excellect combatants in there own right.