I’ve owned both.
the Korean ones tend to have a very dark stained back/sides almost opaque.
The chinese ones are more like the old Gibson 70’s walnut.
there are a couple knocking about used in gold, one seems clean at £400 Chinese, one is battered and Korean £395.
As an outlier there’s also a Korean Peerless bass master for £500 ish - which is the old Korean Epiphone factory making their own version.
there’s no difference in build or sound.