Ounce for ounce, gelato is better. It has fewer calories and less sugar than ice cream. Gelato also has half the fat of ice cream because it’s made with milk, not cream. That’s according to registered dietician Lauren Slayton. Plus, she says ice cream is less filling than gelato! Because it’s not as dense and has more air, so the flavor is less intense than gelato. That’s why people tend to eat MORE ice cream, while they’re likely to be satisfied with less gelato.