All JK's come with the Dana 44 in the rear - that release info says it was optional on all other models with a package - we don't get the tow package down here
The Rubi has a higher spline count rear Dana 44 than the sport, plus one in the front instead of the D30.
Have a play with that spreadsheet, theres also other bits on there you are welcome to download if you want too.
EDIT: Damn you have to type fast on here!!! Three replies came in while I was typing this