Lets say if I am on PIM 8.1.1.01 version of Informatica and moving to PIM 8.1.1.05. While taking delta of the repository do I need to compare my current repository to the repository provided in hotfix 5 or the original repository of 8.1.1.01? Thanks.
It's pretty safe to assume that there have been repository updates in-between by the standard. You should merge your adjustments from 8.1.1.01 base then I to the new repository. Always keep backups while progressing ;-)