Hi Fried
This Balti Malarky, Nobody seems to know for sure what the original Paki version is yet.
Need a time machine and a bit divine intervention to solve the mystery. ;D ;D
But since the early eighties, Balti cooked by Bangladeshi BIR and TA's (1,000's Nationwide) have been your standard BIR curries
with a dollop of Balti paste added for the flavour.
If you look at Bob's best photographs of the Balti's he's bought from some of the most famous Balti House's in Brum,
they look no different from standard BIR curry fayre and look like the've just had a dollop.

It would be different if they were curries shown were loaded with whole spices and cooked from fresh.
I do remember one restaurant here doing this style, all those years ago.
Until Bob can find a Original Pakistani Balti. 
I'll continue with what I know for sure, but for anybody who can't get Pataks Balti paste
You could try this recipe for making your own jar up.
Chewy's Balti Paste