rings don't really wear ,they stay smooth as long as the diff has not slipped.

If the diff slips using carbide ? The balls flat spot and ruin the rings along with.

If the diff slips using ceramic , the balls scores the rings.
The balls will stay smooth & round and can still be used again.


Reason ceramic lasts longer is because they super hard and never wear.

Set the slipper so it slips & not locked up will save all.