I would expect the service to be way better in F, than J.
What I am saying is from that photograph, it is difficult to see how the BA seat is better than the Jet seat.
It may be, but it is not obvious from the photo, which s not a great advert for the seat.
Have you flown the Jet Airways seat? I have, more than once.
I have not flown the new BA F seat, so cannot compare them, but I have flown the old BA F seat and from a seat only perspective, didn’t find a lot of difference, although the Jet video screen was a lot larger and the BA seat offered more space around the seat, which one would expect in F.
I slept very easily on both.