Duke kunshan vs KAIST

I am an international student hoping to double major in math and computer science. I have got two admission offers from Duke kunshan(full tuition scholarship) and KAIST(full scholarship plus stipend).
But I can’t decide between the two. What I like about DKU is its global experience and the fact that it gives a Duke university degree which might help in getting into graduate school in US and work there. But the remaining cost after the full tuition scholarship is still somehow expensive for my family. On the other hand, I don’t have to worry about cost at KAIST. But I don’t know if I will get the same kind of educational experience and job recruitment at KAIST. Upon my graduation, I hope to move into US by getting a job or getting into grad school.
So, please help me decide between these two.