The casting itself also tends to be better for the hindi ones. The chemistry is very evident right from the start. In regional I don't think that kind of chemistry exist 😐 But like you Idk about other languages, just talking about my own (Bengali)
We had an IPK remake. The story was kept almost exactly the same, same scenes with little alterations here and there, but the chemistry was totally missing between the leads. Arshi were fire, while those two were like do rupaye ka pepsi
You know what I even saw bengali version of ipkknd that too without subtitles. My Kolkata stay experience gave me that understanding of language ☺️😆.. i think it's name is Bhojena se bhojena right???