Short verdict
Buy in Korea. Best purchased during a Korea trip, usually because of local access, price, testing, or limited bundles.
Lip tints are luggage-friendly and often make sense as Korea purchases. The problem is shade accuracy across screens.
What to know
Buy in Korea when you can compare shades, finishes, and seasonal displays in person.
What to avoid
Buy online only for shades you already know or when the retailer has clear swatches and return rules.
Final verdict: test in Korea, reorder online.