[ QUOTE ]
Depends upon which is greater: the length of your legs or the width of your ass. Sucks to be a tall fatass riding in coach!
[/ QUOTE ]Truer words, my friend, have never been spoken!
With regard to the original question, I don't think either is a bad ride. However, on flights over six hours (i.e. Hawaii, Europe, Asia, etc.) it is worth it, on any aircraft, to get first or business class if possible. Spend the extra $$ or a mileage upgrade or, if non-revving, wait for open seats up front! The best coach seat in the world is still too narrow and too close to the seat in front of it after six hours.
For the record, I've flown to/from Europe in coach on the 747-400, A-340, and 767. The 747 (Lufthansa) was probably the least comfortable of the three, the 767 (US Airways) in the middle, and the A-340 (LH once again) the best. Say what you will about Airbus, but my opinion is they've thought out passenger ergonomics better than Boeing has.
My best ride to Europe and back was on the DC-10 (Continental), but that was in the jumpseat (talk about space! three flight crew, two jumpseaters, and still room to hold a convention up there) so I can't comment on the ride in steerage.