I looked at the brochures for the latest model LX and LC. LC height=74" while LX=75.2" - given same frame, that probably goes a long way toward explaining break over differences.
Perhaps the Australian specs are from a 5 passenger model. Suggested due to comments on what appears to be a raised rear end on the 2020 HE model. I really wish I would have measured my 2017 against the 2020 HE. The HE looks higher in the rear, but no science behind that observation. Assuming it is higher, combined with the LX vs LC in USA specs goes a long way toward explaining numbers (I think).
Link to the AUS ebrochure? Nevermind - found ebrochure. They get the Sahara Horizon Special Edition (US spec Heritage Edition), but they get eight colors while we only get a choice of two - thanks Mr T.