I fly regularly from MAN via DOH to MNL, so I think you get the airline of choice. The first sector is normally A330-2/300, I also fly J, the seating here is not exactly brilliant but the flights seem stable with not much noise even without the noise cancelling headphones.
The 2nd sector is normally 777-2/300. The noise (from airflow?) seeems louder. The -200 seems more stable, not wallowing as much as the longer fuselage. Qatar use 9 across seating in Y and that looks adequate, not sure it would be comfortable 10 across. I'm also of the opinion of a seeming pulse to the sound of the engine.
I once flew Northwest Orient from LGW-MSP in a 747-1/200 and if I remember correctly it was 10 across, but as a 14 year old the seat wasn't required to be as wide. Maybe seats are now thinner across the base?
I do prefer the ride of the A330 but I love the interior arrangement on the the 777's.