Not to go all geek but wtf? I mean if you read the books the Spartans in these videos are completely different. These guys seem more like ODST's. Okay sorry climbing down off my Algebra book.
IIRC the Spartan 2's were the only group to undergo the full skelletal augmentation process. The Spartan 3's were essentialy disposable Spartan's reliant on a heafty cocktail of drugs. The Spartan 4's fall in between, but more towards the Spartan 3 end of the spectrum than on the Spartan 2 end. (I'm still playing through the campaign and haven't started Spartan Ops).
Spartan 2>>>Spartan4 >Spartan 3
IIRC the Spartan 2's were the only group to undergo the full skelletal augmentation process. The Spartan 3's were essentialy disposable Spartan's reliant on a heafty cocktail of drugs. The Spartan 4's fall in between, but more towards the Spartan 3 end of the spectrum than on the Spartan 2 end. (I'm still playing through the campaign and haven't started Spartan Ops).