You will never be able to go back you know!

EK 777s are slightly less in offerings than the 380s, but not much difference, expect for the shower. The bar is interesting but we rarely visit that now from the F cabin. The newer 380s are nicer with slightly better controls and functions, but there's really little difference btw the 777 and the 380. We usually pick the middle seats in row 1 or 2 and each F experience we've had on EK has been exceptional, once you get over the bling. It's nice to be able to close the doors and have an uninterrupted flight.
Note in EK F, they tend to leave you alone but given you can eat and drink whenever you wish, just press the call button and you'll be served within 20-30 seconds. Brilliant.
Enjoy. We look forward to you trip report!