What information is available about the 'Laghu Guru Charitra' and its relationship to the work by Saraswati Gangadhar?

The Preface offers some interesting details about a separate work known as the 'Laghu Guru Charitra.' Chapter 0 mentions that this work from Wadi, consisting of 707 verses, is distinct from the 'Brihad Guru Charitra' by Saraswati Gangadhar. It is believed to be much older than the 'Thorale Guru Charitra' (the great Guru Charitra), although its protagonist, Shri Samarth Sadguru Narsimha Saraswati Maharaj, is the same. The text also provides a specific historical detail, noting that the Samadhi date of the protagonist is given as Shake 1140 in this older text.