The text mentions several Guru biographies. What makes the one by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj distinct from those by Dabholkar and Saraswati Gangadhar?

The preface distinguishes between several Guru biographies based on their authorship and prominence. While the works by Shri Saraswati Gangadhar (Brihat Guru Charitra) and Shri Annasaheb Dabholkar (Shri Sai Satcharita) are highlighted as detailed biographies written by devotees, the one by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj is noted for a key difference. Chapter 0 explains that since this biography was written by the Maharaj himself, it cannot be categorized in the same way as those written by devotees like Gangadhar and Dabholkar.