The text mentions Ratanji visited two saints, Sai Baba and Gajanan Maharaj. Can you compare their approaches to helping him with his desire for a son?

This premise is incorrect based on the provided source chunks. Chapter 14 only documents the story of Ratanji, a wealthy merchant without a son, being advised by Das Ganu to visit a single saint: Sai Baba of Shirdi. The narrative details Ratanji's subsequent journey to Shirdi and his initial meeting with Sai Baba in the Masjid. There is no mention of Gajanan Maharaj in these passages, nor is there any account of Ratanji visiting a second saint. Therefore, a comparison of their approaches is not possible from the given text.