I have also noticed that sikh punjabis are taller compared to pakistani punjabis, I think it has to do with better resources and nutrition diet available to sikhs during ranjeet singh and british times. Muslim punjabis were kept backward and uneducated during those times first by ranjeet singh and later by brithish. But after 1947 the situation has completely changed and
Arains are considered a very low caste in Gujranwala, Gujrat and Sialkot, come out of your south punjab bubble where your british daddy settled you to do slave agriculture for them.