...but this is one the dumbest questions I've seen...better for what and for whom?
It's like ask wich is the better: an Audi A8 ou a BMW 335?
Both are superb machines: 777 is more suited for long haul, high density routes, with excellent cargo capability. Otherwise the A330 is the smartest choice.
Having flown both, as far as the "fun to drive" factor is concerned, I'd pick the triple.
