SYD/MEL - LHR will earn more for example...
The maximum earn for any single Flight with Qantas frequent flyer is 420, including east coast OZ to Europe.
I used to regularly earn 520 SC's for AKL-xMEL/SYD/BNE-LAX rt in Business class.
Last decade, with a 20 segment DONE4 (oneworld around the world fare in business) I earned ~2300 SC's ... that was before these were reduced to max 16 segments and "Simpler and Fairer".