Uhhh, didnt they both get made by Borg Warner like someone mentioned earlier......derp....

120Y's and KE's of around the same years used borgs (except for the 4 dr wagon which uses a H145 centre according to the one I pulled out from underneath the one at the wreckers). If you unbolt a plate to look at your gears you've more than likely got a borg. If you unbolt the carrier and axles to look at your gears, youve got a jap diff.

And it probably differs between jap assembled and aus assembled vehicles. Buggers me, if it bolts in it bolts in.