I recommend checking each segment on the BA calculator if you have a choice of airline, remembering that RTW tickets book into specific fare classes which vary by airline (see table at 5(b) of Rule 3015), and that the Avios and Tier Points awarded can differ between airlines that fly the same route.

e.g. SYD-HND - you could fly JAL or QF on that route, but JAL are more generous.