Good job indeed!
I guess the basic difference between Karan and Vuvraj is - Karan is smart and cunning whereas, yuvraj is stupid and selfish!! Karan cares for his family too much and for his parents's honour's sake, he is destroying his own life too by getting t=into the revenge thing. But Yuvraj on the other hand, never cared for his family and others are destroying his life and he has no clue about it! Yuv is worthless!