Answer: difference: ① purpose: the reform of vassal States in the spring and autumn period was to establish hegemony for slave owners and nobles; During the Warring States period, political reforms in various countries were initiated by the emerging landlord class in order to establish feudalism, establish and consolidate the dictatorship of the landlord class and achieve reunification. ② Content: The former pays attention to reusing talents, reforming internal affairs, developing production and reorganizing the army; The content of the latter is to abolish the well field system, recognize the private ownership of land, reward farming, establish the county system, implement centralization, and weaken the rights of slave owners and nobles. ③ Features: The former reformed and maintained the old system of slave-owner dictatorship; The old slavery was abolished, the new relations of production replaced the old ones, and the dominant position of the emerging landlord class was established. The root cause: their social and historical conditions are different. 1 The Spring and Autumn Period was a period of hegemony among great powers, and the economic foundation of slavery was relatively solid. At the end of the Spring and Autumn Period and the beginning of the Warring States Period, with the disintegration of the well-field system, new ways of exploitation appeared, and feudal relations of production emerged and developed. During the Warring States period, the political reform of various countries was an inevitable requirement after the emerging landlord class became economically powerful. 1 The establishment of feudal system is also the inevitable result of this historical development.