Newest batch of 77W has 2-2-2 in business class. You can choose 291 or 277 seater fleets below 777-300ER:
https://www.koreanair.com/global/en/...777-300er.html
which will result in different seatmap, and different "Seat Guide". You'll enjoy newest prestige suites with a direct aisle access even from window seats. It must be better than 380 experience. Enjoy !!