The regular dining plan includes 1 snack, 1 counter service, and 1 table service / day on the plan. The table service ONLY includes the entree and desert along with a beverage.
The deluxe plan includes 2 snacks and 3 table service meals / day on the plan. Each of the table service meals DO provide appetizer if appropriate. In other words, there isn't an appetizer when used for breakfast.
The deluxe plan does allow you to still eat counter service but it will use one of the table service meals.
For the little difference in price, it was worth it for us. But every family will have to make their own decision.