I think

1. Ingredients: The main ingredients of chocolate are cocoa beans, sugar and milk powder, while the main ingredients of coffee are coffee beans, water and sugar.

2. Taste: Chocolate tastes mellow, while coffee tastes bitter.

3. Calories: Chocolate has higher calories and coffee has lower calories.

4. Function: Chocolate has a refreshing effect, and coffee has a refreshing effect.

5. Applicable people: chocolate is suitable for the public to eat; Coffee is more suitable for people who need to refresh themselves.

6. Preservation: Chocolate should be kept at a suitable temperature; Coffee beans need to be preserved at low temperature.

7. How to make it: There are many ways to make chocolate and coffee.