Punjabi Men vs. Urdu speaking Men

I dont know how can you generalize things this simply but I am from KArachi and my best friend is a Punjabi. We in fact are 4 best friend (2 from punjab and 2 of us from Karachi) and we meet almost every weekend my wife call them ___ bhai, their wives call me ____ bhai, I call them bhabi ....they call my wife bhabi .... we all have dinner together, we sometimes sit in same room and talk if we have a common topic of discussion else girls have their own little meeting in another room, in summer break we all go for fun together...

It has more to do with the upbringing of a person/nature of a person than "punjabi" or "karachite"