It's important to realise the importance, because Lucknow has Gomti,Shatabdi,DoubleDecker,AC SF.
Varanasi has Mahamana, ManduadihSF,Kashi,GaribRath.
Allahabad has Unchahar,Duronto.
So most of the cities have alternate option,
So it's important to figure out the importance of...
more... one or the other because the importance is not because of imposing injustice on one or the other,it's just that the absence of one can affect the system to how much extend.