Reply/“Solution” from JetPartySalad: “Thanks for the feedback. We are closing this as won’t fix. We placed the Holden #10 outside the Forza AUS division because it was not the same generation or field as the other 3 Forza AUS cars currently in the division.”
The VF Commodore, FGX Falcon, and L33 Altima all belonged to the “New Generation V8 Supercar” era, more commonly known as Car of the Future. Car of the Future was introduced when the VF arrived in 2013, with FG Falcons upgraded to the new specifications, and L33 Altimas, E63 W212s built new to the COTF rules in 2013, and 2nd-gen S60s in 2014. COTF ended in Supercars with the retirement of the L33 Altimas at the end of 2019, and only the ZB Commodores and S550 Mustangs were built to the newer Gen2 Supercars rules.
All four V8 Supercars currently in Forza Motorsport 2023 belong to the same division, and frankly, the two VFs should have the exact same specs.