Originally Posted by dnw
Maintenance is just that. It cannot change an original design. ETOPS twins have more designed-in safety features than quads.
You'll have to define which quads.. The A340 can be ordered with exactly the same ETOPS features as the A330.
Originally Posted by CharlesMD
In MS Flight Sim 2004 I can get a much faster rate of climb out of a 744 with a full fuel load than a 777 with a full fuel load (although that could just be my bad virtual piloting!).
If you are using the default MS flight models, you can't draw any conclusions..those flight models have an extremely tenuous link to their real-life counterparts.