Do pet words and IELTS words repeat?

Although both IELTS and pet belong to Cambridge system, the content and level of assessment are not the same. At present, many universities such as Commonwealth countries and the United States accept IELTS scores, but few universities accept PET. Pet is equivalent to IELTS 5-6.5. IELTS is divided into academic category and immigrant category. In China, PET tends to be used by teenagers to obtain good junior high school entrance qualifications, while IELTS tends to be used by high schools or universities to apply for undergraduate courses or research.