Which of the following is one of the differences between probability-proportional-to-size (PPS) and attribute sampling?

Probability-proportional-to-size (PPS) sampling is a technique used to reach conclusions regarding monetary amounts in a population. It is designed to handle variable sampling by focusing on monetary units, making it appropriate for testing account balances. On the other hand, attribute sampling is used to assess the rate of occurrence of a specific characteristic or attribute in a population, such as compliance with a control procedure, and does not focus on monetary amounts.

The Institute of Internal Auditors (IIA) Practice Guide on "Audit Sampling"

Generally Accepted Auditing Standards (GAAS)