The reason is that the appearance of the southern imperial clothes of the major sects was designed uniformly before Zoroastrianism came out, so after Zoroastrianism came out, a unique set of clothes will not be redesigned for them, and the same style will generally be applied. Zoroastrianism's new suit began in Pojun. In the same way, the Tangmen was born after the design of the spirit, so the appearance of the Tangmen spirit is the same as the school uniform, and the new clothes started from Nandi. Beggars are the latest models, so even Pojun is the same model. Only Dingguo is a new suit.
Well, as for some suits, such as Soul, Shufeng and Zhu Tian, and these slightly special ones, I want to distinguish them. These suits are basically the same model in all sects, but the colors and details have changed, so Zoroastrianism should still exist. The soul of the soul was born in Huahou Mountain in the 1970s. The soul clothes of Tangmen, Zoroastrianism and Beggars' Guild all look exactly like Chunyang except for the sects written in their names, including colors. But ghosts do have their own characteristics. Tangmen has a separate suit of Sichuan style, but I haven't seen the Zoroastrianism Beggars' Sect, so I don't know. It shouldn't even be the same color as the soul. Zhu Tian is the only group of Zoroastrianism. After all, it is not difficult to change the color of this suit and modify some details of the same model, but it is not a school uniform.