Spartan 2s
Augmentations and Training:
They were abducted at the age of 6 and heavily trained until they were 14 years of age. John was said to have the body of an 18 year old olympic athlete at the age of 14. They would then undergo the augmentation process. The augmentations were better for the spartan 2s than 3s or 4s due to their “Perfect genes”, which increased their reactions by 1400%. The 3s and most likely the 4s as well were only increased by 300%. Their speed, reflexes, strength, eyesight, etc were all greatly enhances and their bones were practically unbreakeable. These things were increased even further with their armor on.
Armor:
The 2s were given MJOLNIR power armor(created by Dr. Halsey), which increased their already incredible speed, reflexes, strength, etc even further. John was 6’10 without his armor and 7’2 while in it. They were capable of lifting three times their weight while in their armor.
Life Expectancy:
As of 2557 there’s only 5 spartan 2s out of the 33 that survived the augmentations with no critical side effect known to be alive. John, Kelly, Fred, Linda, and Naomi. There are Jerome, Douglas, and Alice who are speculated to be alive due to being in cryo aboard the UNSC Spirit of Fire, but they’re driting in space with no slipspace drive. There’s no confirmation on what’s happened to them as of now.
Notable members: John, Kurt, Kelly, Fred, Linda, and Jerome
Spartan 3s
Augmentations and Training:
Spartan 3s were children who were orphans. They were taken in and were heavily trained(better than the 2s actually).
The 3s got the exact same augmentations as the 2s except for the Thyroid Implant, which increased the growth of skeletal and muscle tissue thus the 3s wouldn’t be as tall or as strong as the 2s. Most of the 3s didn’t have the “Perfect genes” the 2s had thus their augmentations wouldn’t be as great. There were those who did have them though(Noble Team).
Armor:
The main reason why the 3s are considered inferior to 2s is because they received SPI armor instead of MJOLNIR armor and while the SPI(Semi-Powered Infiltration Armor) armor was good, it wasn’t anywhere near comparable to the MJOLNIR armor. The reason they were given this was because it was much cheaper and much easier to mass produce than MJOLNIR armor. There were, however, those who received MJOLNIR armor and it were those with the perfect genes, which was Noble Team.
Life Expectancy:
The 3s were created to be expendable. They were sent on suicide missions so the casualty rate for them was quite high in comparison to the spartan 2s.
Notable Memebers: Carter, Kat, Noble 6, Tom, and Lucy.
Spartan 4s
Augmentations and Training: Spartan 4s are volunteers from the highest branches of the UNSC such as Marines and ODSTS. Since their volunteers it’s quite clear their training pales in comparison to the 3s and 4s since they were training since they were kids.
The augmentations for the 4s are unknown at the moment. The only thing that’s clear is that technology has advanced enough so that adults can now be augmented without a severe casualty rate.
Armor: The 4s have received Generation 2 MJOLNIR Armor, which is said to actually be lighter than Generation 1, but more adaptable.
Life Expectancy: Unknown
Notable Memebers: Palmer and Thorne
My list of the spartan programs from greatest to least would be Spartan2s>Spartan3s>Spartan4s>Spartan1s