It's been a bit of a mixed bag, some of the 777-300ERs are ex-EY aircraft (VT-AER, VT-AEO, VT-AEN and similar registrations, you can identify them on Flightradar24 as the aircraft without the red jharoka windows livery), so decent J and F on them.

If you are flying in Y though, I would have a slight preference for the original AI aircraft as they have a 3-3-3 economy layout.