I wouldn't assume that the housing type guarantees the internals are the same.
I like to browse Rockauto or Nissan sites and look at part compatibility. Click the part number in Rockauto and compatibility will show up. The Nissan site is a little more tedious.
I chose 2008 for an example, a couple of parts.
https://www.rockauto.com/en/catalog/nissan,2008,armada,5.6l+v8,1438226,drivetrain
https://parts.nissanusa.com/p/Nissan_2008_Armada-SE-56L-V8-AT-4WD/Differential-Pinion-Bearing-Rear/89867147/38120-7S000.html