Well I think it comes down to whether you want to work in Asia or in the US. I think choosing HKUST is pretty much a commitment to work in Asia (most likely HK/China) since a great majority of HKUST’s placements are in the region. On the other hand, I don’t think Carnegie Mellon (Tepper) is as well known as the big brand name US schools in Asia (correct me if I’m wrong here I’m not too sure) so if you want to work in Asia, it might be difficult, depending on your cultural background and language skills.
During my interview for HKUST, I asked the interviewer (former head of HKUST’s career services - Stanford MBA grad) pretty much point blank, “How would you compare HKUST to a top western school?” Have to give props to her because she was quite honest about it and said that the school was pretty young, so most of the placements were in HK and China. She did say that they were trying to develop placements in Singapore and that they were making progress here, but for the immediate future, for most HKUST grads, career options will be mostly in HK, China and maybe some in Singapore. She also said that some people had success finding jobs in western countries, but these were the exception rather than the rule. She concluded by saying that if I was committed to a career in Asia, then in her opinion, HKUST was a great choice.
Another factor for you to consider would be costs. Based on HKUST’s estimates, the entire package (tuition, living expenses, accommodation, etc.) comes out to about USD 75,000 or so, even cheaper for you with your grant/scholarship. Carnegie Mellon seems to be the same as other US schools, and will cost you well over USD 130,000. You could argue that the salary you’d get after Carnegie Mellon would be higher, but it’s difficult to compare salaries across different countries with different standards of living, different tax rates (HK is pretty low I hear) etc..
I’m in the process of making a decision as well. I was accepted at HKUST but dinged at all my other R2 applications (all US schools). Given the tight deadline, (deposit deadline is March 16) I have to choose between taking HKUST now, vs. applying to more schools for Round 3, or maybe even going back to the drawing board and giving the whole application process another run for 2012 intake.
Anyway, long story short, HKUST is a good school that puts you in a good position to develop in Asia, particularly HK/China, but at the cost of limiting your options elsewhere. There are other factors including costs, but I think the most important thing for you to consider would be the direction you want your future career to take. Good luck with your decision. I’m going through something similar myself.