If you compare Existing Non stop train between Jaipur & Delhi Sarai rohilla it is having more benefits than DD. i.e. DD is having maximum speed of 80 Kmph and will complete it journey from Jaipur to Delhi in 7.5 Hrs. while existing nonstop is completing it in only 4.5 Hrs.
DD will charge you more than 350 Rs. per journey while existing non stop is charging us only 100 Rs. Its a truly common man's train.
Again request Indian railway non to discontinue existing train. Though they can run DD...
more... as an additional option...