FlyerTalk Evangelist, Ambassador, British Airways Executive Club
Join Date: Jun 2008
Location: Somewhere between 0 and 13,000 metres high
Programs: AF/KL Life Plat, BA GGL+GfL, ALL Plat, Hilton Diam, Marriott Gold, blablablah, etc
Posts: 30,526
"AA 777" means little because 77W, 772, and 777 have entirely different J cabins and all three are used by AA!
Frankly, if I were to rank AA-BA LHR transatlantic J seats, I'd probably go:
AA 77W - BA 744UD - AA 772 - BA 388UD - BA 388LD - BA 787 - BA 777 - BA 747LD - AA 777 (unrefurbished).
However, for full disclosure, I typically choose BA personally for a mixture of CCR lounge access ex-LHR/JFK (or to an extent IAD for the dining room), ability to GUF to F, or CWLCY for the relaxing ride and pre-clearance. Exceptions are ex-LAX/MIA because the 77W comfort on the longer LAX flight really is nice (in theory you could also use the nicer OW lounge with the new corridor but I don't bother to cross half the airport for that) and for MIA if I can get a good plane, I can pair it with the Amex Centurion lounge which is very much nicer than the BA lounge.