Gelatto v. Ice Cream - what is the difference

We were having that conversation the other day after a special Hagen Daz treat post-dinner. My feeling was that it was a different fat content. Sitting here today watching the house hunters marathon and seeing the new Hagen Daz gelatto commercial raised the question again and prompted some research. The bottom line seems to be that gelatto does, in fact, have less fat, but also less air, churned at a slower speed, and stored/served at a warmer temperature. Another mystery of the universe solved. http://cookingequipment.about.com/od/icecreammachines/f/gelatovicecream.htm