I'm flying the 339 for the first time this fall, in PS - finally burning my miles at a somewhat obscene redemption rate before they inevitably get devalued further. AMS-JFK on the DL metal.

How does the narrower 339 PS seat compare to say a CR9 F seat? And do the aisle armrests move? I typically take a window on daytime flights and an aisle on overnight flights on other airlines' PE (especially AA on the 789/772)

[I'm on a 763 for the ATL-BRU and took the bulkhead center PS, which from looking at aerolopa looks awfully similar to or even better than the 1993 UA 763 2-2-2 J seats I flew early in my professional career.]