the best english exam is... o melhor exame ingles 'e...

I have a doubt, could you explain the diffences between TOEFL, Michigan and Cambridge... Witch one is more important ?
[01:59:31] genius7001 diz: i never heard of michigan
[01:59:43] waldir.borba.jr diz: humm
[01:59:56] genius7001 diz: toefl sounds big in north america and a german guy mentioned it once
[02:00:19] genius7001 diz: cambridge is world known every country knows it and respects it
[02:00:31] waldir.borba.jr diz: humm
[02:00:35] genius7001 diz: ielts seems to be the biggest world exam currently
[02:01:48] waldir.borba.jr diz: i'm thinking about be a certificate, so today i started to search all certifications that exists
[02:02:10] genius7001 diz: i hear that cambridge is best for brasil
[02:02:15] waldir.borba.jr diz: i never heard about ielts
[02:02:32] genius7001 diz: probably not good in brasil then

ielts is good for entering unversity but is more hard than cambridge fce
you need like 80% in ielts to enter university, even a native speaker would find that hard
i got my English GCSE with an A grade (the highest) and averaged 70%
(this is the most valued english qualification in the UK)
it depends what your purpose is, i believe cambridge fce is the best