Rajdhanis are more punctual then durontos. Ex : Sealdah/Howrah Raj are punctual then Sealdah Duronto
some sections durontos are not given high preference over the SF trains as well. Ex : NZM-PUNE-NZM duronto is overtaken by BRC-BCT express most of the times.
Food and service are better in Rajdhani than Durontos