I recently booked a flight to Japan and my normal route was not available for some reason (ATL-DTW-NGO). My route this time is ATL-ICN-NGO and I'm flying KE for the first time. The flight numbers are coded DL.
I was assigned a seat way in the back and could not chose a better seat from the DL website. I called the DM line and they were able to get me a better seat. I'm not sure if KE has C+ or something similar. Plus, I'm not sure what benefits I get with KE as a DM.