I need to redo this diagram and update it with exact offsets but you get the idea of the rim profiles and offsets.
A great reference that diagram, and I look forward to your update, but here's a little help for now. All of the 6.5" Defender rims are the SAME 20.6mm positive offset, but the centre disc of the ANR1534 is much more dished to give the
appearance of negative offset, compared to the flatter disc of the ANR5593 and ANR4583.
PS remember that given the same offset a 6" rim has 0.25" difference to the 5.5" rim on the inside and similarly 0.25" on the outside.
And in the same way, a 6.5" rim with a +20.6mm offset has the inner edge in the same position as a 5.5" rim with +33.3mm offset (and therefore chassis clearance and turning lock). It is the outside edge that is moved out 1", and the centreline of the tyre tread is 1/2" further out and overall track increased by 1" (which is the maximum allowable in most states (or 25mm, if that's different enough for the nit pickers) without Engineering Certification). All of the 6.5" Defender rims are
dimensionally legal for the Perentie, but whether they are rated/approved is another kettle of fish (or
THREAD actually).