on 18 there is only 4 seats left, will go full as y is 0’d out already, best hope is that the remaining F seats don’t sell and you upgrade at the airport.

​​​​​​​on 17 Y is well over and F is wide open - flight will go full -more chance of snagging seats on this one I’d say but EK may make you wait until the gate to process the upgrade (in my recent experience) so you may miss out on the 4 lounge or you may be lucky and they at open up - keep checking on the app.