The front diffs for all the AWDs should be the same. They are not LSD - they're all open, F160 (I think it's 160) type.
The GTR rear diff is, of course, quite different to the other cars'. CV joint input on the rear end of the tailshaft. Larger axle diameter with more splines + proper 6 bolt flanges. It's a pain in the arse to use GTR diffs in other cars because of the other things you have to change. The only reason to do so is if you have very good reasons (cheap access to the stuff you need, particular diff centre you want is only available for GTr type, etc etc). Otherwise, it's often better to just keep the original R200 housing and put in the mech/other centre you need/want. That is unless the original diff was from an NA or something and only had 3x2 flanges. Nothing wrong with those diffs/housings/stub axles/flanges. It's just the tripod CVs on them that are not as robust/good as the ones on the 5 bolt driveshafts.