THE DIFFERENCE BETWEEN XXVIII

What's the difference between:

1. Public education and making a large contribution to a psychiatric hospital?
2. One who gives everything and one who eats everything?
3. A palace brat and a palace window?
4. A college professor and an FBI suspect?

Answer:

1. One is a fundamental institution and the other is to fund a mental institution.
2. One goes all out, the other goes all stout.
3. One's a royal pain and the other is a royal pane. 
4. One has the third degree and the other is getting it.