A330 is a very nice plane. Have flown them on several Aer Lingus trips between JFK
, and Aer Lingus' cabin appointments make it very comfortable besides. It's also simply a great looking aircraft.
My direct comparison with the A340 wouldn't be quite fair - had disastrous trip R/T between JFK
on 2 of Sabena's A340s in 1998. Scary problems - cabin lights in entire sections going on and off at random (without flight attendant control), all in-ceiling video screens lowering and raising again uncommanded during taxiing and takeoff roll - causing not a few concerned shouts from flight attendants back and forth etc. Also injured my hand in the lavs when the undersink steel door hiding extra soaps etc swung and hit me, and a sharp edge cut me (the retaining latch didn't work - and why would such a door not be covered by safety standards mandating rounded-off edges?). These were probably a combination of airline maintenance problems and glitches with the 'plane itself, but either way didn't instill a lot of confidence.
Again though, loved the 330.