As already noted, the Europe sectors need to change. Note that the Australia domestic sectors that you have excluded from the OWE may only offer Y service depending on the timing. But if you are paying separately for them, then they can be picked up at a reasonable price in Y anyway.

There's not much difference between the service offered on QF and BA in F. There are some minor differences in the product that come down to personal preference. The layout in the 744 is slightly different, with QF's seats being 4 rows and floowing the outer walls, while BA's layout has 5 rows and the seats are at an angle to the fuselage. but they have the same number of seats (14) with QF having 1x2x1 from row 2 back.

Another decision maker may be the typical wines offered. QF will tend to feature Australian wines which may be of interest to you. But for me, BA offer better scotch - the wine is less of an issue to me.

You will get the same lounge access with BA and QF.

What's point on being on the longest aircraft when you are sitting right up the front . If you choose CX, you will get access to the excellent CX lounges in HKG, and that is probably worth the difference. QF will be a 744, so you enter the aircraft, turn left (always better than turning right) and won't see another non-F passenger for the flight.

I will look forward to the report.