I suspect CX will get the majority of the votes and would be my preference, but QF offers a good product and will be the preference of some.
If you're taking a night flight, I would suggest QF128 because it's a 744. I find upstairs in J to be much better than on a single deck aircraft. This is the only OW 744 flying this route.
If it's a day flight, then I would go with CX on their 330.