How do the biographies of Sai Baba written by Annasaheb Dabholkar and Dasganu Maharaj differ, according to the preface?

The preface explains that while both Annasaheb Dabholkar and Dasganu Maharaj wrote about Sai Baba, their works have distinct characteristics. As noted in Chapter 0, Shri Dasganu Maharaj's two biographies, found in Bhaktalilamrut and Bhaktisaramrut, are described as excellent and heart-touching but very short. They cover many of the same stories as Dabholkar's Shri Sai Satcharita. A key difference highlighted is that Dasganu Maharaj also depicted the pitiable state of the country and its causes in his works, a topic Annasaheb Dabholkar did not involve himself with at all.