The goal of factory objects / benefits of using a single instance to return a type

Question

What is the advantage of a static factory class as opposed to using an instance of the same object to return this object?

For example, from the N2 CMS take a look at this code:

News News = Factory.Persister.Get (itemID);

// A news variable can set news-related properties.

Factory.Persister.Save (news);

Factory is static, and I know that there are / are factory objects, but I don't see the benefits of a static factory (which probably takes responsibility for setting up different types), as opposed to using a Newspage object for this.

thank

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