It very much depends on your 777 layout for KE (new vs old). it should be new, but if you click on the plane in DETAILS when making booking, you can see the layout. Personally, I think that they're both equal in terms of general service. People do say that Asiana has better food, though (but again, the menu will be the exact same almost haha bibimbap and steak). Also, the A380 is now rapidly disappearing, so it might be good to take a ride on the upper deck before it's gone forever.