Duronto is delayed almost everytime. For punctuality and better service always prefer Rajdhani. List should be like this
1. 12301 Howrah New Delhi Rajdhani Express (Via Gaya)
2. 12313 Sealdah New Delhi Rajdhani Express
3. 12305 Howrah New Delhi Rajdhani Express (Via Patna)
4....
more... 12259 Sealdah New Delhi Duronto Express
5. 12273 Howrah New Delhi Duronto Express