Jab tak hai jaan copy of a tamil movie?

Ijust read this review of the movie in this website.It says Jab tak hai jaan is the copy of a tamil movie called Vaaranam Aayiram.I feel the scenes look similar but the story might be different.Here's the link:https://www.washingtonpost.com/gog/movies/jab-tak-hai-jaan,1238343/reader-reviews.htmlHere's the story of the tamil moviehttps://en.wikipedia.org/wiki/Vaaranam_AayiramI don't think Kat has a small role in the movie because the way they are promoting her in the movie,it seems like she is the heroine and will end up with srk in the climax.