Originally Posted by subsonic001

The A350 is manufactured using much more modern materials and techniques so it can achieve a more natural cabin pressure.
As the A350 is made from carbon fibre composites rather than the aluminium used in the 777, the cabin altitude is around 5,500ft. The 777 has a cabin altitude of 8,000ft.
This will change with the 777X but I’ve always found long haul in the 787s to be far more pleasant and it doesn’t dry out my sinuses as much. Put it this way, I can always get to sleep on a 787 or A380 but I’m yet to get a decent night sleep on a 777.