defender diffs

i fiited range rover diffs in my previous series2 and everything went allright, i am looking for some more now for my present series2, and think they are getting a bit scarse, question is, are defender diffs the same ratio as rangerover ones as i think they will be a bit easier to find

All diffs from coil sprung landies are 3.54:1, defender, disco and RRC.

rrc early diffs where only favourite as had oil filler plug in diff housing and not all series have rear oil filler in axle case like later vehicles front allways has so no problem i often weld nut to case and drill out to make my own rear axle filler as early rr diffs rare but 10 spline disco or def still available