E ticket
1. You can book it online until before chart preparation. You can pay it for via internet banking or Credit or Debit card.
2. You can cancel it online before chart Preparation & if you want to cancel it after chart preparation then you have to file TDR. If you cancel before chart preparation money will credit in your account with in 2-3 working day.
3....
more... During journey you must bring Original photo ID prof with you.
4. You can take it's printout when you wish before journey date is over.
5. You can book in General, Tatkal, Ladies, Senior citizen quota only.
I ticket
1.You can book it online before two clear calender day from your journey date.
2. This ticket is deliver on your given address at IRCTC they takes 40 rs for every PNR.
3. If you wana cancel it then you must go on to PRS counter & money will not refunded in cash to you. Money will refunded in debited account while using booking.
4.You can book in General, Ladies, Senior citizen quota only.
PRS Ticket
1. You can book/cancel it with in time limit of PRS counter. (Some station has facility to book after chart preparation)
2. You can book in any quota through PRS ticket.
3. You can book/cancel ticket through cash payment.
Regards
HE2L