Hey, does anyone know if there's a difference in NV273 transfer cases?

I searched and found two different ID numbers but can't find out what the difference is.

I'm looking to do a G56 swap on my 09 and keep my original transfer case.

People say it won't go into 4 low but don't have a solution or a reason.

Just trying to get as much info as I can before I begin the swap.

Any help is appreciated; thanks.