More locations: Now over THIRTY. More choices: special programs, volunteer positions, language classes. More security: Members of BBB, all courses externally moderated. More Accurate Info: No hand-picked testimonials, all course feedback availble online. More Support: worldwide lifetime placement assistance. More Experience-running worldwide courses for 10+ years. More FUN! ...... TEFL International
The difference is that with CELTA/Trinity CertTESOL employers 'know what thy are getting'. Om other courses, if they match up, you'll have to prove it.
This is possible, but some employers see it as too much effort.