I apologize for not posting my sources:
Here it is: http://hudson.idt.net/~beck/app2.htm
Apart from the above source, here's what SAS says about their B767/ new A340's:
Basically, this is the best economic alternative. Factors such as aircraft size, fuel consumption, cargo capacity, and maintenance/ground handling costs were considered. The A330/340 has a break-even cabin factor of about 70% as compared with Boeing 767 which has 85%. An average cabin factor above 80% is difficult to reach, so operating with the Boeing 767 has often been unprofitable. Whereas a cabin factor of only 70% with the A340/300 will be profitable.
The Airbus planes do not have the limitations on total cargo capacity that Boeing 767 has. What sometimes happens today with the Boeing 767, if the wind conditions are poor causing higher fuel consumption, is that the aircraft cannot be take a full load (passengers, luggage and cargo) on some destinations.
Environmental demands are met with these Airbus aircraft.
Several other Star Alliance airlines have Airbus in their fleets and SAS, along with the other partners, is seeking conformity within the Alliance.
The airplane’s interior is flexible, making it easy to adapt to new service concepts and products.
This family of aircraft enables future flexibility if SAS, for example, wants to acquire larger, smaller or longer-distance versions of the Airbus.
Both aircraft versions offer the passengers enhanced comfort and in customer surveys Airbus has received the highest score for cabin comfort. Space in the overhead bins is ample and larger than Boeing 767’s, and the seats are wider.
The A340 is purely a long-haul machine with four CFM56-5C4 engines (same supplier as the Boeing 737), which can fly the world’s longest routes without re-fueling. The aircraft is capable of flying non-stop up to 8500 nautical miles, which corresponds to a round-trip Copenhagen-Peking. In SAS they will be used primarily for Asian destinations.
The two-engine A330, which flies mid- to long-range, will operate mainly to North America.
The aircraft have low fuel consumption, lower than Boeing 767.
Airbus meets SAS’s current environmental demands and is continually working on long-term environmental compliance in its production.
The noise level is low, both outside the aircraft and in the cabin."
BTW Chiawei, I was not talking about lower operating costs, but lower fuel consumption.
And, of course, if you guys have any other sources please share them with us.