Please compare the roles of Das Ganu and Gajanan Maharaj in assisting the merchant Ratanji.

Based on the provided text from Chapter 14, a comparison of roles between Das Ganu and Gajanan Maharaj is not possible because Gajanan Maharaj is not mentioned in the narrative. The source material clearly outlines the role of Das Ganu, who acted as a spiritual guide for the merchant Ratanji. When Ratanji revealed his sorrow about being sonless, Das Ganu directly advised him, "Go to Shirdi; you will obtain your heart's desire." Das Ganu's counsel was the catalyst for Ratanji's journey to meet Sai Baba. In contrast, as Chapter 14 makes no reference to Gajanan Maharaj, he plays no part in this story. The title "Maharaj" that appears in the text refers to Sai Baba.