Based on the text, why is the Guru biography by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj considered to be in a different category from those by Shri Saraswati Gangadhar and Shri Annasaheb Dabholkar?

The text provides a specific reason for this distinction. As explained in Chapter 0, the Guru biography written by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj, while detailed and scholarly, stands apart from the works of Shri Saraswati Gangadhar and the late Shri Annasaheb Dabholkar. The primary reason cited is that this particular biography was authored by the Maharaj himself. Chapter 0 states that because he was the author of his own biographical account, it cannot be categorized in the same way as the biographies written by other devotees or authors.