Where is better, native English speaker or English teacher in teaching the English language?

Each teacher's background as native speakers and non native speakers has advantages and disadvantages. Native speakers has advantages mastery of language, because of course native speakers to master their mother tongue, while the non-native speakers have the advantage of unfamiliarity able to convey the lack of foreign language being studied by the learners with the use of an intermediary language. However, the most important thing is not a native or non-native status of her. That essence is whether native or non-native teachers have good competence in the field of linguistic and teaching (pedagogic). If both the teacher competencies that are expected then they are considered as a teacher who is eligible to teach. In any case in that both are relatively equal competence, then, of course, native who is better, because after all a native speaker has advantages compared with the non-native, namely in the linguistic field. A mother-language speakers, certainly will be more fluent and familiar contexts and meanings contained in language that is sometimes not able to master.