The preface mentions several Guru biographies. What distinguishes the work by Vasudevanand Saraswati Maharaj from the Satcharita and the Guru Charitra?

The preface discusses a Guru biography written by Shri Samarth Sadguru Tembhe Swami, also known as Vasudevanand Saraswati Maharaj. While this work is described as detailed and scholarly, Chapter 0 points out two key distinctions. First, it had not become as famous as the 'Guru Charitra' by Shri Saraswati Gangadhar. More importantly, it is placed in a different category altogether because it was written by the Maharaj himself, separating it from biographies like the 'Shri Sai Satcharita' and the 'Guru Charitra', which were written by disciples about their Gurus.