Presentations and Notebooks are similar in concepts in that they both are good ways to organize materials for a certain issue or witness, but they can serve very different purposes.
Notebooks are for organizing or printing things in a certain order. Everything in a notebook retains its original ID only.
Presentations allow you to put items in the order you'd like to present them, and assigns them a new ID (e.g. OPEN.1, OPEN.2, etc) that allows you to move through it in LIVE mode using just arrow keys.