As a controversial subject, it has always been a matter of concern for educational analysts to find out which one of the EFL or specialists-in-the-field teachers might cause the students of the ESP courses meet their needs. The researchers tried to find out the level of students? satisfaction through these two different classes taught by EFL or specialists-in- the-field teachers. Therefore, a student rating was conducted. One-hundred and sixty-seven participants who were studying in different majors in different universities, took a four-point Likert Scale questionnaire that included 30 items related to the teacher?s knowledge and abilities, functions, and methods and techniques performed in the class. The analysis outcome showed that EFL teachers could enjoy more votes than specialists-in-the-field teachers in conveying a more influential ESP teaching environment that lead to some classroom implications.