Convergence?

After confirming the dark gold coin was indeed a Tudor coin with a "2" denomination, Franca inwardly cursed the Blood Emperor's persecution of those with obsessive-compulsive disorder.

Why such a significant difference in patterns when it's just a different denomination?

They're essentially expressing almost the same symbolic meaning!

Niceea, unaware of her superior's peculiarity, continued to describe the origins of the two items, "This brooch is a Gustav family item, made according to their family crest. It's one of Louis Gustav's most valued possessions and a symbol of his identity.

"Normally, he carries this brooch with him, but this time he left it in his original hideout.

"This ancient gold coin and the brooch were kept together and seem equally important."

Under the pull of invisible spider silk, the brooch formed by intertwined snakes flew towards Franca.