You can't compare the two serials or the characters
DK was a nice real to life drama where all the characters were very strong and maintained their characters and not change. Zoya was lively but strong and maintained her character throughout the show – it was real nice how she handled her relationship with Dr. Sheena their confrontations were awesome. Dr Ahmer too maintained the same maturity level throughout the serial - in love, in anger, in every relationship, during depressed period ..
In this serial the character change their personality everyday.. Nidhi is determined but immature – the fight track between her and Ashu was really juvenile. And now Dr Ashutosh obsessed with Kushi
But then you can't blame the actors it's the writers who create script , and we have to go thru these in the name of TRP.