I have flown quite a few legs EK, to Dubai, 777, and further after (once) with EK, to Singapore, (and back to LHR) A380, and there is no way on earth that I'd fly that distance again 777.
Econ all the way 380, and it was a different long haul experience. I know if I went out on my hols that I would arrive in far better shape to enjoy them due A380. I would pay for the better travel any time