Generally speaking, both Shanghai dialect and Changzhou Yixing belong to Jiangnan language, which has certain similarities. For example, in pronunciation, the initials of Yixing dialect are very close to those of Shanghai dialect, while in vowel, the "er" in Yixing dialect is the same as that in Shanghai dialect.
However, there are some differences between them. For example, in terms of vocabulary, Yixing dialect has some unique vocabulary different from Shanghai dialect. In addition, Yixing dialect and Shanghai dialect also have some differences. For example, the rising tone of Yixing dialect is 33+2 1, and that of Shanghai dialect is 22+35.
It should be noted that the differences between dialects vary from individual to region, so if you want to know more about the differences between Shanghai dialect and Changzhou Yixing dialect, it is recommended to refer to more materials and conduct on-the-spot investigation.