777 air conditioning noise is horrendous; the big engined variants (GE90-115B) vibrate in the cabin. As one who also is lucky enough to fly a lot in J-Class, the A380s peaceful interior and it's feeling of solidness in take-off, landing and turbulence (due to the active load alleviation?) wins it for me every step of the way.
And by the way - Lufthansa claims that the A380 has 6% lower fuel burn per seat than their 747-8i (published figure in Lufthansa Magazin). I humbly suggest that they are the only ones who today know this for certain, so I tend to believe them.
Last edited by panda-k-bear; 12th Jul 2012 at 13:16.