I know dear....
But you given me current Scenario of 12878...I always run towards BRKN and Enjoy running..... I think U Forgot.. CNB Shatabdi Nd Naharlagun has same Depart Time and IR know the hurdle of Rajdhani Gang,That's the reason IR Given same Travel Time,MPS, Priority,Slot to 22412 as Rajdhani....So that they can run Back-to-Back with same MPS.
Other wise IR definitely given extra time to pass on the Rajdhani Gang....It is totally discrimination createf by NCR itself.