R180 vs R160 Rear Diffs

[BXSS]

I have a couple of STi LSD rears (V2 4.111 & STi Ra 3.9) that I thought were R160's.

Then I see some guy selling a GC/GF STi LSD rear as a R180.

I thought the R180's were noticably larger than R160's - right.?..??...

[SemperGuard]

r180 has a 180mm ring gear, r160 has 160mm ring gear, so it's slightly larger. There were some GC STi's with r180's though.