The specific differences are as follows:

Pizza sauce is usually made of tomatoes, garlic, onions, olive oil, herbs and other ingredients. Tomato paste is mainly made of simple ingredients such as tomato, sugar and vinegar.

2. Pizza sauce is mainly used to make pizza, which can be coated on the crust as pizza sauce. Ketchup is a general sauce, which can be used to make various dishes, such as spaghetti, hamburgers, French fries and so on.