I'm replacing a damaged wheel hub on my '93, and the hub I purchased from RockAuto is slightly different than the OEM I removed. For those who don't know, it's a GS, so both hubs are for discs.
Here's a picture, if I need to label which is OEM and which is new, you need more help than I do
are you asking why they're different? or just noting that they are different?
cause the ribbed ring is for ABS in case you were asking, i'm sure if you found a non-ABS hub it wouldn't have it
I know nothing about the hubs, but when I had an ABS shaft, the ring could be pulled off with little effort. Give it a couple shots with a dead blow hammer.