What is the difference between Institutional TOEFL and International TOEFL?
Institutional TOEFL is the TOEFL test that is given by an institution such as a language school or company so they can test your level of English. Although the score you receive may be accepted at many colleges and universities around the world, not all places will accept this test. Unless you know that Institutional TOEFL is accepted at the university where you want to apply, it is recommended to take the International TOEFL.