The squadron make up is about the same but helis can land pretty much anywhere, refuel and be off which means they can fly greater number of sorties and not be bound to the base. 15 Units are more than enough to cover the entire FATA regions and beyond because at any given time, no more than two gunships are needed in the air over an active Ops area where intense fighting is taking place.
MI-35s have caught the interest of PAA because of their niche COIN oriented design, they can fly CAS, offload troops, take on casualties and be off. It does alone what you needed a bell and two Cobras to do before. PA is not confused, our people don't realize that buying an attack helicopter or any defence goods of this magnitude is always a slow and deliberate process. It can't be rushed, it takes about half a decade at least to finalize and then the Army has to live with that decision for the next two decades at minimum. So they have to weigh all available options, tempt suppliers into offering better deals, simulate any and all possible scenarios where these helis might be needed and how they might handicap the forces.
And when you have four platforms in the running, its bound to take some time.