DItto to shibz.
I havent watched KTH so cannot relate to Sujal Kashish, but going by the story it seems to be inspired by Kashish that was aired on DD long back with Sudesh Berry and Malavika Tiwari, the boss secretary , love hate track that is .
Love Hate track goes way beyond any tv show, right from Jane Austen's pride and prejudice every other story uses the track.
KMH was altogether different, it had a that magical feel. Like shibz said Arjun had a different story to tell. And KMH definitely inspired two of the recent and currently running shows, because character to character, scene to scene is copied.
KMH was unique in its own way. A saga for me, both the seasons.