1. It all depends on where you would like to work. If you want to work in the US post-MBA, you should go to Fuqua; if you want to work in Europe, you should go to Said. US work authorization is pretty hard to come by, even then only you will be sponsored to work, and your wife will not be able to work.
2. Fuqua’s international student placement is pretty good. You can check out Fuqua’s employment stats. Typically, the international students command slightly lower salary than domestic students.
3. Oxford has a stronger overall brand in East Asia (I don’t know much about other parts of Asia), but I am not sure about how strong the MBA brand is. I do know that Fuqua is working hard to create inroads abroad. It has campus in Russia, Middle East, and building a campus in China (KunShan). Fuqua also has a huge number of international students from all parts of the world (especially strong Indian and Chinese population), as mentioned by InCaseYouAsked. So in the long run, Fuqua may have stronger alumni network abroad.