In a few days, I fly into ICN on DL from ATL then take KE
#603 on to HKG after a 4 hour layover.
The reviews make me think the west lounge is better than the east, yet apparently the distance is so great that one should go near the departure gate esp since both have showers.
Recent flights of 603 have used both east and west departure gates so I may not know until relatively late where to go unless I am misreading the data.