UA's 767 hard product in both J and Y is superior to that of LX's 777 or A330/A340, unless you're a couple in J looking to sit together (which is impossible on a UA 767-300). In J, UA offers direct aisle access from all seats on, whereas on LX many seats have a seatmate and lack direct aisle access. In Y, UA is 2-3-2 compared to 2-4-2 (A330/A340) or 3-4-3 (777) on LX.