Choose for the journey, not just the price
Compare journey length, overnight travel, air-conditioning preference and the needs of your group. A daytime seated journey and an overnight berth serve different purposes. Check which classes the particular train offers before comparing fares; not every service carries every coach type.
Read class and coach labels separately
The class describes the accommodation booked. The coach label identifies the vehicle you should find on the platform. A berth number locates your place inside that coach. For example, a class field and a label such as B2 are not interchangeable; keep all the ticket fields together when checking the allocation.
Compare sleeping and seated arrangements
SL denotes Sleeper; 3A and 2A denote AC three-tier and two-tier accommodation. CC denotes AC Chair Car and 2S denotes Second Sitting. A representative layout can help explain the arrangement, but it does not prove the exact vehicle design or final berth for your ticket.
Example: plan an overnight family journey
First check whether each traveller can use the allocated berth safely and comfortably. Then compare whether the departure and arrival fit the family’s routine. A lower-berth preference is not an allocation guarantee. Do not promise a specific berth to a family member until the official ticket actually shows it.
Before boarding
Check the current allocation and match the coach label to the station display. Use the layout to understand the coach interior, and coach position to locate it along the train. If the displayed rake differs, ask railway staff instead of inferring a new allocation from a diagram.