is there a difference (other than stud pattern) between an RN40 4wd rear diff and a 2wd rear diff?

only reason I ask is, I'm just looking to pickup one of these diffs for the ease of having an LSD in my corona (G series diffs were in the hilux's if my memory serves me correctly)

I will be getting the stud pattern changed to 4 and the hubs machined down for normal rims too. So this isn't an issue.

Sorry if this has been asked before, but searching didn't reveal too much!
(there was a whole thread dedicated to this on the old forums)

Thank you in advance
Adam