Is no one gonna talk about the Black Panther scratching the shit out of captain's shield?

It would make sense that Black Panthers vibranium is stronger since its from the pure source and not smuggled out and possibly diluted.

I believe the shield is only laced with vibranium. Becuase, if it was a solid vibranium shield, you would not hear it bounce. Blank panthers claws however nay be solid vibranium, and as such, are stronger than caps shield, similar to the way diamonds work. The only thing that can scratch a diamond is a stronger diamond (without the use if modern tech).

Moreover, a nation that's had exclusive use of it for so long would likely know a way to forge vibranium stronger than that of Cap's shield

Sharpened and made of pure vibranium

Maybe his claws are diomand tipped? He is a trillionare after all.

Vibranium would be stronger than diamond