In the first cutscene of spartan ops we see 2 4s talking about how they made the ladies of some city feel safe and secure...
And then 1 of them flirts with Commander Palmer...
So how different are there augmentations compared to 2s and 3s?
-
The Spartan 2's and 3's had a side effects of reduced drive, so basically all of them had no drive. As for the 4s Admiral Parangosky said told Halsey that they woud be normal people. So really they are Spartan 1s with Sparta 2 armor. [Edited on 11.08.2012 6:34 AM PST]