What difference do you find between The Iliad and The Odyssey?

What is the most compelling difference between the two epic poems?

I find the two protagonists to be greatly different. In The Iliad, Achilles seems ruled by his passions, and in The Odyssey, Odysseus is more cunning and intellectual.

I read these each in college and then again in graduate school. Each time through was a revelation.

Amazingly, my fourteen-year-old daughter has been assigned them as summer reading before entering advanced-placement English class in ninth grade this coming fall. She is enjoying The Odyssey much more than The Iliad.