Bonnie and Clyde, Beyonce and Jay-Z.... Marlow and Kurtz?

Marlow and Kurtz are the only two characters in Heart of Darkness that are given names. I would assume Conrad wanted to display that these two share a connection, a sort of parallel, that go beyond any understanding.

Perhaps Marlow and Kurtz share more similarities than I'd like to think. Is that why Marlow's interest in Kurtz continues to grow, regardless of the terrifying things he begins to hear, as he ventures deeper and deeper into the Congo?