are rear diff casing all the same. as in bolt patten??? and size??

i know a my99 sti is the same as a 04 sti. But what i would really like to know is.... is a early wrx rear diff housing any differant to the above two.??

thank you.

 

i think there all the same but just want someone to confirm this

 

there are two types
R180 and R160
The R180 is wider than the R160.

R160 I know is in a Uk2000 model and later newage cars have the R180.

Andy

 

thank you