It depends on pashto accents
Kh is the mainstream dialect of Pakistan, it's the standard one with most literary history attached to it but Pashtun members can talk more about it if it's standard or not
but what I do know is that it's the mainstream one atleast in Pakistan and many famous poets wrote in that dialect
maybe that accent adds a twang to it- kh is the accent you hear on tv or songs or whatever comes out on mainstream pashto
Standard dialect of Punjabi in Pakistan is Majhail dialect
This is a Majhail dialect folk song - this is the eastern dialect and the standard one
But Punjab lehnda (western) dialects are softer - man on my DP is king of lehnda dialects songs imo
For example This is a song from Hazarawal, KPK
Notice it's tone is much softer than standard, Western dialects