Work /
Studies In Poland, is it easy to survive on part-time jobs? [259]
Cambridge is better for students who are looking for a deeper understanding of structure and are interested in long-term study. IELTS is great for work- and study-based English
This is very true.
For the sort of part-time jobs that overseas students do in Warsaw, a certificate is rarely required. Re. certification, the bottom line is that in the landscape of formal language assessment, so much depends now on commercial considerations. HR departments are getting a (basic) knowledge of IELTS bands, Cambridge is well-marketed in some parts of the world but not others (the Oxford suite seems almost forgotten now, even by professionals) and the Council, who run the Cambridge exams in so many places is bureaucratic and currently in a state of flux and chaos.
The Cambridge exams are certainly more prestigious and demonstrate a more rounded skill set, however I do suspect that in the future we'll see much more IELTS. TOEFL also seems to be gently slipping away except in regions where many have a chance to study in the US.