The fares of Duronto are at a lower side on the policy of ‘Go Popular to Sell Higher’ though the facilities are at par with Rajdhani.
One comparison has already been given. Have one more:
12953 A K Rajdhani goes from BCT via SWM to NZM (SWM 1027 Kms.)
12239 Duronto goes from BCT via SWM to JP (JP 1159 Kms.)
12953...
more... provides one with High Tea and Dinner
12239 provides one with Tea, High Tea and Lunch
Hence cost of food in 12239 is higher and the run is also higher by 132 Kms. (SWM – JP stretch)
Now see the fares: Train > distance * 1st AC ** 2nd AC *** 3rd AC
12953 > 1027 * 2780 ** 1665 *** 1255
12239 > 1159 * 2860 ** 1645 *** 1185
You will appreciate that in 2nd and 3rd AC fares of Duronto are lesser than Rajdhani even when the distance is more and food provisions are not less. In 1st AC, though the comparative figures seems higher but the difference is only Rs. 80 while difference in fares of the same 2 slots of a Simply Superfast 12955 is Rs. 131.