Mohammad Rafi and Kishore Kumar are inarguably the two best male singers Indian Cinema has seen and the debate about which one of them was better has been going on for ages now.
However, one interesting fact that gives Mohd. Rafi an edge over Kishore Kumar is that Mohd. Rafi gave his voice as many as 6 times to the songs which were performed on the screen by Kishore Kumar. You can read more here.
P.S. I have grown up listening to the songs of both these maestros and adore both of them equally.
