Granite is best for rough use as it is naturally hard and strong and that’s why it is more durable, it also offers scratch resistance and high level of heat resistance. Damaged granite can often be repaired to minimize the appearance of scratches or damage. Where as Korean develops scratches easily. Hot objects or the Hot Pots will melt the finish easily. But these days you do get heat proof/ heat resistant Korean tiles. Korean looks very beautiful wherever used bit it is very expensive. Re-polishing is the only solution if Korean stone/tile is chipped or develops scratches.