^
first and the most important difference... NO WARRANTY ang korean version. Our Local Samsung service centers does not honor that version for the simple fact that the korean version was never ever release outside KOREA itself. That alone is something you need to think about before you buy the korean version.
secondly, The korean version has an antenna (that the international version don't), and right out of the bat, it can't support long text message.
third, internal hardware is very different from the international version, even the network band.
So, those are something you need to consider about. Yes the korean version might be cheap enough, but if you value in the long run if your after for service and repairability of your korean phone thru direct local Samsung centers... You better think twice nalang.