What is the difference between apostolic pardon and absolution?

I was preparing for Catechism Class tonight on the the last things, the notes in my teachers manual say that unconscious people receive "apostolic pardon" if they get the anointing of the sick while unconscious, and should go to confession if they regain consciousness. What does that mean and how is it different from absolution that comes from the sacrament of reconciliation? [related question](https://christianity.stackexchange.com/questions/33922/how-can-anointing-the-sick-confer-forgiveness-of-sins-in-catholicism)