No. Nissan named two differentials the "R200". You'll see people calling them "longnose R200" and "shortnose R200".
The longnose R200 came on the 280z, 280zx, and Z31 300zx.
The shortnose R200 came on a bunch of Infiniti's in the 90's, and the S14 & S15 and maybe some other vehicles.
Before you ask, I don't believe you can just swap the LSD from a shortnose R200 into a longnose R200 without a buncha work. I could be wrong, and as always, almost all of this info is out there already.