radev_4eva,
Its a known fact that everyone copies from each other. But the thing is how they either implement or go ahead with that track makes all the difference (maybe not all, atleast some difference ).
I heard the same that you have said here about 12/24 KB's promo. But I also heard that instead of Simi agreeing to go ahead like Dev & Rad hide this fact from the entire family and it even goes to the state where Rad leads Dev by hand to Vishaka, in 12/24 KB Abhi, Simi husbands instead of agreeing to do what Rad does (Simi is Dev's place & Abhi in Radhika's place), Abhi beats the crap out of Rajiv Bhalla (in place of Vishaka). So, there is difference 😊, If not me, the serial viewers and the show creators will vouch for that.
BTW, I no longer watch 12/24 KB.
it's actually Simi that beats the crap out of Rajiv Bhalla with a hot thick steel rod. don't watch the serial but just caught that bit at the end.