There is a difference, India has the purse and pockets to implement this approach of blanket banning because they know that players in general don't have alternatives ie the IPL is their only source of life changing sums of money, and now that many IPL owners are buying teams in the ILT20, SAT20, Carribean League, Hundred, MLC T20, foreign players will now soon realize that if they **** off an IPL franchise owner, very likely they will lose opportunities in all the other leagues as well.
Cricket Australia is now considering selling the big Bash teams to private individuals as well.
Pakistani psl owners in comparison cannot afford to ban foreign players from the PSL unless they pull off a stunt like James Faulkner did because they need the foreign players more than the other way around and they cannot afford to pay them the life changing sums of money that the IPL franchise owners do and that the foreign players have many alternatives to the PSL.
It is a sad situation of the PCB and the PSL franchise owners having to tread carefully and making the most out of a bad weak situation