PSA (Protection Sports Association) and IPO (renamed as IGP) are both dog sports that involve obedience and protection work. However, PSA is a more recent sport developed to provide an outlet for civilian competition in canine obedience and controlled protection. It emphasizes practical skills and real-world situations, with a wider variety of breeds participating, while IGP originated as a breed suitability test primarily for German Shepherds and focuses on a more standardized set of tasks.