It would be most foolish to compare Bollywood actors with South Indian superstars like Rajnikanth, Sivaji Ganesan, Mohanlal, Mamooty, Chiranjeevi, Nagarjuna, and even Kamal Hassan, simply because they are in a completely different environment and setting. The best thing about the Southern actors is their humility and social conciousness, while Bollywood actors like Amitabh and Shahrukh are world renowned, what have they really done for the people at large. In fact, they haven't either bothered about the very film fraternity that has made them what they are.
Rajnikanth's humility and simplicity is legendary, he moves around like just another person and not a super star. The only things our Bollywood biggies like Salman and Saif have done is either killed hapless beggars on the roads or chinkaras in the wild. Or our good ol' Aamir will talk about Narmada dam and then conveniently forget about it and start selling Coke and Samsung.
They seriously need to learn from the Southern stars, a lesson and many about their social role and responsibility. While quite a few of them might have their wax statues in Tussads, the southern stars have really won the hearts of their audiences.
So please lets be sensible and agree that there is no comparison between the North and the South. It is too pretty obvious.