What does the preface reveal about the 'Laghu Guru Charitra' and its connection to the 'Brihad Guru Charitra' by Saraswati Gangadhar?

The preface in Chapter 0 explains that the 'Laghu Guru Charitra' is a separate and distinct work from the 'Brihad Guru Charitra' written by Saraswati Gangadhar. It is described as being 'much older' and consists of only 707 verses. Although they are different texts, they share the same protagonist, Shri Samarth Sadguru Narsimha Saraswati Maharaj. The text even provides a specific date for the protagonist's Samadhi as Shake 1140, based on information from this older work. This establishes the 'Laghu Guru Charitra' as an important, more ancient text, even if it is not as large or famous as the work by Saraswati Gangadhar.