First, the materials used in the production process are different.

For smoothies, most of the materials are mainly pigments, fruit powder, water or juice, while the main materials for milkshakes are fresh milk, cream and eggs.

Second, the production method is different.

Sand ice does not need to be sent, that is, the material is directly solidified into ice, and then the ice is made into fine particles, and the ingredients are put on, which is simply to break the ice. Milk shakes are delivered. Milk shakes are made of cream and eggs. A certain amount of milk will dilute the yolk paste and mix it with the cream, which is actually melted ice cream.

Third, they have different tastes.

Sand ice just breaks the prepared ice cubes and adds some ingredients such as fruit grains, which are generally rough to eat. Milk shake is cream and eggs, even with fruit, it is mashed, and the overall taste is more delicate.

References:

Baidu encyclopedia-sand ice

References:

Baidu encyclopedia-milkshake