Rank for Ivey is not bad,however, job market in Canada is not as good.
Also, the brand of Ivey/vs that of Oxford in China differs a lot if you decides to return.
West Ontaria is less prestigious than Oxofrd, but it is the opposite when you comparing Ivey with SBS, especially in the eyes of those companies who know the differnece between a b-school and the whole university. (They are the very companies you wish to work for after MBA graduation.)