Though its a duet the lyrics style is like the "Athiradi" song from Sivaji.
I hope they have done justice to the song in picturisation.
I also heard songs in Sura are tamil versions of some Telugu songs.
This song also resembles the "Vaa chellam" song from movie Thoranai.
And for those who are still wondering which song I am talking about it is the "Naan nadanthal athiradi" song.