No the difference is the writing. Kuch Rang for all its flaws wasn't a typical ITV show where MIL was planning and plotting murders & there was no psycho third angle. Most conflicts between Dev and Sonakshi were internal. They didn't show Dev or Sonakshi agreeing to marry random ppl because they were blackmailed. They didn't show Dev insulting Sonakshi before everyone or pushing her off a bridge because he was protecting her from someone. In most shows, including KZK, the premise was that the lead couple were perfect for each other but kept getting separated because of external circumstances aka evil MIL or psycho third angle or blackmail from a new character. Here the writers never tried to show Dev and Sonakshi as perfect couple. Their break up was because Ishwari overdosed out of guilt & Dev being short-sighted & looking for a stupid solution and being insensitive in the process. The eventual divorce also was not because of the MU created by Vicky. That was more of the tipping point. It's because of everything else that played out before which laid the base for the misunderstanding. The biggest difference between Kuch Rang S1 and KZK is not acting or bgm or anything else but the writing. Kuch Rang had great writing esp for 150 plus episodes. There was a reason why they fell in love and there was a reason why they broke up. Most other shows make the leads fall in love without any proper reason & the separation is also contrived. Apology or no apology aside, Durjoy Dutta as a writer >>> And yes Dev and Sonakshi >>>> (irrespective of the actors playing
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For me story is same same but presented in different format. Dixits were too plotting n blackmailing(mami, neha, esh). Dev too did to sona. Dev's harrassmement for sona to work for him, and esh's prenuptual, infertility track n post leap how esh said sona moved on etc. Mami burnt her own house to move into dixit mansion. And then Vicky troubling dev. There were all same plotting n blackmailing. Dev too so arrogant n he troubled sona so much. Sona too like other shows forgiving mahanatha. For me story was same and presented in different format. And I found major difference in presentation is dixits are given clean chit after giving all trouble to bose family with out apology. Other hand victims went on apologising. So, yes there is difference😆.
Infact certain vampish behaviour not shown in other itv shows I guess or I don't know if they hv shown. Like esh keeping devakshi seperate after wedding n not allowing them to go honey moon and then forcing daughter in law for medical treatment. I don't know in other shows they went into this much torture. Krp one level up in torturing DIL. I think most of the shows where ML family tries best to show DIL is not good n try to show her as theif something like that. All they do is plotting to seperate couple n send FL away. (I am only guessing as I hv hardly watched saas bahu serials). I was mostly into star one shows. So my knowledge is very limited😆