I travelled in chennai nzm rajdhani as well as chennai nzm duronto train in last one month. Here is the comparison:
________________Rajdhani_________Duronto
Caterer________ private___________irctc
Rice___________half boiled________fully boiled
Curd__________non branded______branded
Ice...
more... cream_____non branded______branded
Tea________less quantity of milk, sugar etc______good quantity of milk, sugar etc
Coffee____given only if asked_____ always offered
Hotness__food was hot, each_____food was not so hot
___________Coach contain Microwave__________________
Taste______very bad______________much better
Water______ bailley-1,____________ rail neer-2
__________Non branded-1______________________________
Food tray__dirty and old styled____clean and big
Linen_______dirty and old__________clean
Newspaper__local hindi paper____indian express and Dainik bhaskar
Overall_______bad________________ good