Good Evening b6v6.

The plane operating the route will be a QF 763. No way it would change to a 333 and the days of the 747 NRT-CNS-SYD are long gone

Although, there has been some speculation about QF palming one CNS-NRT flight off to AO (Australian Airlines), with a 763 in a premium economy/economy configuration. I'd imagine then (if this happens) either the Qantas SYD-CNS-NRT or BNE-CNS-NRT flight would be canned and replaced with an AO service. Please remember this is a QF/AO rumour and may not even happen, but you never know

I'd say the SYD-CNS-NRT flight would stay with QF and the BNE-CNS-NRT flight would change to AO.

Interesting...

Cheers
QF NB