IELTS are divided in to two parts:-
Academic and General ielts.
Academic ielts is mandatory for student visa for any country. General helps to fetch permanent residency worldwide.
PTE:- pte academic is an english language test designed by person education to asses the readiness of non-native english speakers to participate in a university level english language instruction program. PTE Academic is a leading computer based test for international study. they test the four skills: reading, writing, listening, and speaking. There are six levels which are mapped to the common.