Here's some reviews, including some on (smaller) Hyundais.
Althoug the Kiwi report for a Falcon Ute is complimentary, I can't imagine ANY tyre doing what he claims to have done.
I've just compared the two treads on line. IMO the KH15 would be better at highway speeds as that solid centre rib will provide plenty of straight line stability.
The 17 may be marginally better in the wet but both tyres have plenty of void space to handle water dispersion.
My only concern with the KH17 is the comments about rapid wear - even moreso than those on here by some members.
What size are your tyres?
Regarding manufacture in China, most manufacturers do that these days to some extent. However, I can't tell you what sort of quality you'll get on a Kumho made there.