Out of all four modules, speaking module is the one which slightly differs regarding its conduct and timing. In IELTS, first of all, examinee has to answer questions face-to face with examiner, whereas in TOEFL, examinee listens to questions and answers in the microphone. Other modules are more or less similar in format. One more difference between both is that IELTS speaking test is taken either prior or after the other three modules, whereas in TOEFL, all modules are conducted on the same day.