IELTS IDP

As a student want to know worth of doing MS from US.

There are a lot of new programs in analytics that have been started in recent years.However most of these programs are so young that there are no reports or statistics available about the employment opportunities for graduates of these courses.It would be great if any of you could share info about the analytics programs at Australia , US , NZ or in UK.

Which is best between IELTS or TOEFL ?