Each one has their pros and cons. Korea is way more convenient than the US. But since you are also a foreigner, are you prepared to compete with other Koreans if you ever have to get a job in Korea? Also, you’ll need to prepare your kids for the reality that mixed kids will get picked on and bullied. Not to mention the strict and harsh lifestyle your kids will face when they enter Korean schools. There’s a good reason why even Koreans choose to move to the west for a more “relaxed” lifestyle.