No they are not the same. A K1 enters the US, they get married and file for AOS. Once AOS is approved they get a 2 yr GC. then roughly 2 yrs down the road they file for Removal of Conditions (ROC). A K3 would be close to this order but they are married on entry. (I only mention K3 since you originally posted in the K3 forum).
CR1's do not file for AOS either, but as they were married less then 2 yrs they get a 2 yr GC and will file for ROC roughly at the 2 yr mark. (90 days before the 2 yr card expires).
IR1's do not file for either AOS or Removal of conditions, they do not get a 2 yr GC, they get a 10yr card.