What can you tell me about the biographies by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj and Shri Saraswati Gangadhar?

The preface in Chapter 0 discusses multiple Guru biographies. It notes that the biography written by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj was detailed, scholarly, and filled with poetic meters. However, it also mentions that this particular work has not achieved the same level of fame as the Guru biography written by Shri Saraswati Gangadhar. Furthermore, because the Maharaj himself wrote it, it is considered a different category of work and is not grouped with the biographies by Shri Saraswati Gangadhar or the late Shri Annasaheb Dabholkar.