Well,I just asked him and he said the "Coil" inside is better so it distributes heat better so it won't burn his hair, and he said it's the electrical charge is different than in a cheap blowdryer so it's not as harmful to his hair/head.
mmmmm.. mmmkay.. whatevers
This is the one he got
http://www.sephora.com/browse/product.jhtml?id=P85231