Sensi keeps multiple phenotypes of some land races they at least used to say so on the description but they are getting more hype nowadays and hardly have any description left. Pck probably has at least mild variation in morphology if seed was collected in the wild pollen mixes in the wind. It's not the same as an IBL made from a few plants. If aces plants are pure indica why is the flowering time sooooo long and the leaf so skinny? It looks like a plant from a valley at the base of the Hindu kush mountains which makes it a sativa dominant growth structure (morphology). However it may have an indica stile high. With more of a stone than Hindu kush even. Lowland plants are saliva highland plants are indica atheist morphologically however that my not hold true for the high 100% of the time.
I can't make sense of what you're saying. I've been growing PCK for years, dozens of plants all from seed, and have never come across any plants with these "Skinny" leaves you speak of. Whatever you grew, saw, or read about was not PCK "Pakistani Chitral Kush".
Whatever you think you know you don't. I don't have the desire to debate the different landrace genetics, IBL's, lowland, highland, etc... Enjoy what you're growing/smoking. It must be good as you are so far out there you must be higher than a kite.