You likely won't be able to get a status match, as Korean companies tend seclude themselves from the outside world. I have Hertz status and the major benefits are vehicle upgrades, if that's the goal there are a multitude of different local rental car options that are often significantly cheaper than Hertz in my experience. The only thing I haven't ever looked into is having different start and end locations in Korea.
Let me know if you have any other questions that I can try to help with.