What are the distinctions between the 'Laghu Guru Charitra' and the 'Brihad Guru Charitra' as outlined in the preface?

The preface, designated as Chapter 0, draws a clear distinction between two different works. The 'Brihad Guru Charitra' is the well-known work written by Saraswati Gangadhar. In contrast, the 'Laghu Guru Charitra' is a separate and distinct work from Wadi, mentioned in a book called Shri Datta Stavaraj. This 'Laghu' or smaller version consists of only 707 verses and is believed to be much older than the 'Thorale' or 'Brihad' Guru Charitra. Despite these differences, the text confirms that the protagonist of both biographies is the same: Shri Samarth Sadguru Narsimha Saraswati Maharaj.