What are the different versions of the 'Guru Charitra' mentioned in the text, and who is their central figure?

The preface detailed in Chapter 0 describes multiple works. It distinguishes between the 'Brihad Guru Charitra' written by Saraswati Gangadhar and a separate, older work called the 'Laghu Guru Charitra' from Wadi, which consists of 707 verses. Despite being distinct works, the protagonist of both is the same: Shri Samarth Sadguru Narsimha Saraswati Maharaj. The text even provides a specific date for his Samadhi as Shake 1140. Additionally, Chapter 0 mentions another Guru biography by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj, which is described as scholarly but not as famous as the one by Saraswati Gangadhar.