On one side .. it is true that anu got more monologues and chance to show his emotions during komo track .. but I feel the main difference lies in their characterisation and situations faced by them ...
I still remember in the temple proposal scene how they showed pre sharing her fears.. that she really thought she lost anu...Also she feels they will never be together as destiny keeps separating them.. she is not wrong in feeling that way..
Although in navu track she was not in love with anu when navu entered but she saw her dreams of being with a prince charming got broken... during mishka track...How bubbly and happy she was after dreaming about anu.. but immediately her bubble got bursted when she saw mishka with anu... When she learnt to trust again that she will get happiness now.. anu married komo.. everything cleared again she started dreaming about a happy life but moh broke her first by saying she will never accept her as her dil and finally bajaj ended up marrying pre..
For pre.. whenever she dreamt of happiness .. it was short-lived .. ie such hurdles only strengthened her belief that she and anu are not meant to be together ... so she has stopped fighting her fate..
In case of anu.. his bubble got bursted more only when pre married bajaj.. i am not saying komo track didn't break him.. but his love pre was fighting with the world for him and they ended up together.. it only strengthened his belief that he and pre are meant to be together.. now agreed bajaj has come in between anupre.. but it is the belief which he has strengthened within is not letting him think that he and pre cannot be together .. so he will keep fighting ..