You are just confusing yourself. LSD is a LSD. Stock Nissans' does not come wit LSD. The most is VLSD and HLSD as far as I know. It may be the housing they are talking about but it does not make a different. If you go buy a Nismo LSD, it will only come with the LSD itself. You will need the housing, output shaft, ring gear, etc.

What you do with your car?
2 way for Drift
I like a HLSD for track