Now the only similarity I can see is RK was always obsessed with Madhu the reasons behind his obsession has changed but never the less he was always obsessed with her. Whatever was the reason behind his obsession the girl always had a huge effect on him and made a huge difference in his life.
Now for changes first RK use to find joy whenever Madhu cried or was upset. Now a days when she is upset he himself gets so pained by her pain that he feels like paining the entire world. (his own words)
Few months ago RK's sole mission in life was to ruin Madhu's life. He spent every moment of his time planning out how to torture her but nowadays RK's only goal is to fix everything in Madhu's life.
Before RK hired Madhu's as is spot girl and had her do chores all day. Didnt care if she was standing for hours. Now a days he gets mad at Madhu for doing chores by choice since she might cause harm to his precious wife's health what he cannot bare to see.
Back then RK use to claim Madhu was his ninth servant but now a days RK want to give Madhu every right as his wife. Those who claim to think differently he threatens them harshly enough to kick them out of the house.
These are the changes love bring in ones life. From a confused soul deprived from love to an overjoyed soul lost in love oh our RK!!!!