Hmph. I have two reward flights booked on this route in the next year. In October it appears to be the older EF seats, in November it switches (in J). My opinion on J is that as long as the seat truly goes flat (and parallel to the floor, not flat and angled like the awful seats on LH) it doesnt matter a lot what configuration they are in. But I would also say that there is less than no chance that I would pay for an economy seat like that for a 13+ hour flight.

Anyway, PE seems to book into O class. And it isnt consistent. For example, departing on Nov 16th and returning on the 23rd you get the 777HD on the outbound and the older style less dense 77W on the return. Blech. PE seems to be about 1/2 the cost of Z for reference...