Do you really know the domestic mba program? if you know fudan and qinghua students should study politics and three representatives as major courses, you will not say such nonsense word!
I know aomething about ceibs's case. Some of them is from overseas. However, some cases are local on companies. CEIBS has a case center which will study and write cases on china's business. For example, a case on how to enter the auto market in China. ( SGM, SAIC).
A good MBA education teaches you how to think, how to solve the problems, how to make decisions based on limited information. It doesn't matter what cases they use in the classroom, be it china-related or not.
MBA is all about brand name. there is one course in MBA called "Branding strategy" (or "Branding"). After that course, you will know what is all about.
I don't really think that case study of Chinese company is worthwhile, cause too many political issues get into the business in China.
In my point of view, if you think China will keep this economy-plus-politics mode and you want to work for Chinese company, you'd better stay in China and build your network. Otherwise, go to the States to learn some real business operating senses.