Picturejockey :: First Class, from Andheri to Victoria Terminus - An image of a season pass or monthly ticket issued by western railway to travel on Harbour line from Andheri to VT and back : photograhy and photo blog of Navin Harish

As you can see from the table below, there is no real difference between travelling first class or second class in a Mumbai local train. Read about my experience with trains and other things I hate on Mental Floss.

First Class	Second Class
Just about enough leg space	Just about enough leg space
Cushioned seats	Wooden seats
People packed like sardine sweating like pigs	People packed like sardine sweating like pigs
Open doors no airconditioning	Open doors no airconditioning
No queue for getting a season pass	A long queue to get a season pass
People playing cards to kill time	People playing cards to kill time