No matter how narcissistic and prideful he is, he has to admit that the sect ID card is better than his creation. He also has to admit that he only knows the formations in the ID card, how they work, and how they interact with each other, but he still can't make the ID card yet
To be honest, his schematics are sorely lacking compared to the structure of his ID card. The ID card is capable of so much more than his armament and should be objectively considered more beautiful.
But he drew his armament, not the ID, so he can't be objective. At most, he will admire the structure and intricacy of the ID card. It deserves that much from him. But he won't consider it more beautiful than his armament because it is not his creation.
His feelings for his schematic are like those of a mother for her baby. The schematic is his baby. Therefore, it is the most beautiful thing in the world.