to those who say they think the 777 is more comfortable than the 330/340:
this is purely a question of personal opinion, but based on experience of all three types on the same routes, I prefer the 330 and 340 to the 777 in terms of the cabin, especially in economy class. Clearly the airline's individual appointments also make a difference, but to me, the lighting and air quality on the Airbus aircraft are noticeably better than on the triple-7. The A340 is also quieter than either of the twins; in economy where one is often far behind the wing, it makes a difference.
It is a known fact in the industry that the 777 has issues with air recirculation. Clearly, more fresh air means more fuel (the Gulfstream IV
has fresh engine bleed air all the time, never recirculated) and Boeing increased the recirculation on the 777 to improve the fuel economy. A 777 with few pax on board feels great, but when the cabin is full in my experience it has been hot and stuffy. The 330 and 340 have never been as bad for me.
The overall size and diameter of the cabins are similar enough for valid comparison, in my view.
my findings are based on:
B777 on the north atlantic with BA
- both the GE90 and Trent versions (the Trent idles much quieter and perhaps a bit quieter in cruise)
330 and 340 on same or similar routes with Air Canada. And don't say the pax loads were lower on AC
than on BA
because in almost all cases the Y-class was packed.
all that said, I'd rather be on an old 74 than anything else on long haul.