Hi @Yuvraj Patil ,
Per my research, Style Library is a document library automatically created by system. It's function is also same with other document library to store files, as its name suggests — is where the system saves CSS files, XSL files, and even images used in page layouts and controls. So we are unable to differ it with other document libraries by base template. They are all 101 too. I have compared some properties of them. And Style Library also don't have any unique properties. We can only differentiate them between List Title or List Id.
Please refer to following document
https://support.microsoft.com/en-us/office/introduction-to-libraries-7d4221d9-8fb9-40d5-8441-2374c84b5e26
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