I am puzzled. There are two songs from 1949 one ion Hindi film Patanga
http://www.youtube.com/watch?v=3v5lcWFIgwQ
and the second from Tamil film Vazhkai (from 11:35 in the following video)
http://www.youtube.com/watch?v=6oY8BhsDOvU
Both sound similar to me. It seems that Sudarshanam copied a few Hindi tunes and Ramachandra's ealier tune influenced one of the tunes in Vazhkai but the above two films are from the same year.