I liked Swetha & Sameer independently in that season, it was Dolly who mocked them Bhai & Behen as sameer was supporting Swetha seeing bullied but they literally never shared such relation or closeness more over itlooked mutual respect and standing for themselves against Dolly nuisances! Infact Swetha & Sameer looked v formal almost like same fraternity collegues type!
Where as Urvashi & Nikentan play it individually yet the same time some informal friendship exists! They want to have gain & thir friend to have gain too type! I like casualness of Niks & Urvi friendship! Its not bhai behen type just as compatible ppl! Here to be frank Urvashi is mre stronger in taking stand, Nikentan might choose to ignore if some1 would create a scene like Dolly!
No comparision as relation level seems diff but like them all!