I think the biggest drawback for a set up like this is the lack if information... I don't know much about Halo, but a lot of people have looked into it all. Because the information exists. Destiny doesn't provide anything, I don't remember seeing any specs about any armor or physical capabilities, how the light really effects a guardian... There's no proper way to compare it. In that respect I can see the Spartans as the victors, just because people know what they're capable of. Personally, my knowledge goes; Captain America in space (with appropriate gear) Vs Space Wizards (Jedi)