[Neus]

They're not different versions of the same, Dev. They cannot be used for crafting that require them, as only the other kind will work.

They should be usable for crafting, the 2 value versions come from treasure balls.

The 2 value Beast Fangs are the useless ones that don't count as Beast Fangs. No idea what they're considered by the game. They used to drop instead of the functional ones for a little bit, but they weren't purged, so if you happen to have any, you can create more if you get Beast Fangs. It'll add the Beast Fang into your stack of useless ones. Pretty sure it doesn't work in reverse, so, best to bank your bogus stack and forget about it (or delete them).

That shouldn't be the case either, but it seems to be, so I've corrected it.