The gear on the only you linked looks like the old school cast gear.
These came on the XL:
Can see the gear a bit better installed in my diff case:
I bought XL diffs off ebay, then used alloy cases as well which required me to change the stupid outdrive cups because they wouldn't fit through the case halves.
Those came out before the "bullet proof" ones. They are machined steel vs cast like the originals. They were also painted black or anno'd black... whatever they did, they weren't a gold type color, but black.