Third Rajdhani for Mumbai deni thi both CR n WR were wanting it. After Duronto, a rajdhani type train, RB wanted to introduce Premium Express, new Rajdhani type train.
CR refused to run it as Premium and made it run as AC SF on MAS Rajdhani time slot from Sept 2013, therefore the Premium Express went to WR introduced in december 2013, which was a super flop concept, even the rajdhani type NDLS BCT premium was degraded to AC SF and it has stopped running.
LTT NZM LTT AC Express became 20 coaches...
more... from 17 coach.
It is ACSF not just AC Express.
Yuva is a ac sf superfast sharing timeslot with GR and Duronto.
LKO AC was originally a duronto and then a rajdhani, back to ac sf.
Naharlagun AC has CNB Shatabdi timeslot.
so, consider all as equal.