2. The leading lady (Kajal Aggarwal) didn't have any contribution to make in Singham. The treatment meted out to the heroine (Kareena Kapoor) in Singham Returns is just the same as well. Oh yes, both had a song apiece too!
3. There is always another cop to give Ajay a reason good enough to fight it out with the rest of the world. Singham began with the suicide of Sudhanshu Pandey. On the other hand, Singham Returns had the killing of Ganesh Yadav establishing the core plotline.
4. None of the songs other than the title track worked in Singham. It is pretty much the same in Singham Returns as well! However, the background score with the thump of Singham combined with Sanskrit chants led to an adrenalin rush in the first part. It is all the more prominent in Singham Returns as well, and in the process results in all the more high impact narrative.
5. Ajay gets angry in Singham 'Aata Majhi Satakli'. Ajay gets angry in Singham Returns 'Aata Majhi Satakli'. You can't change the core of a movie, can you