According to http://panoramic-3d.ru/forums/vindecoder.php
I have the 3.36 final gear ratio. I haven't been able to check what my car says as the axle code, but doing some reading, I found that the RC33 (which I ordered) is VLSD w/ 3.357 final gear. So, It sounds like I did good at guessing which differential to get.
EDIT: Also, checked the donor car's VIN and it matches my equipment as far as final ratio, _BUT_ not on the infintiusa.com page. Apparently, the donor car has "track trim" and NOT a sport which I have confirmed that mine IS. Plus, me finding that the RC33 was VLSD was just something someone said on a forum. It looks as if there is a 2PIN and an LSD on the infinti parts page for the donor VIN. The part number that the seller posted was similar to these infiniti part #'s but isn't a vaild number. So I may have a raggedy, open differential.
EDIT2: Here is what Infiniti told me my car's differential part number is: 383100C010 while the part I'm getting has a number: 383110C044