I've no experience with Cheese. The only pollinating I do is open or selective to a single branch. I've not collected and saved or shared pollen but once for my B-I-L to cross his female Purps with my male Bubblegum x Blueberry. I have a decent collection of seeds to choose from and I have some offers for a few premium cuts (Hells Angels OG, Bubba Kush, Katsu) that I may get around to growing one day. But I'm pretty pleased with the stable I have at this point.
Yes, the Mazar-i-Sharif is two totally different strains. Crazy. I have grown the indica and it's very nice. The sativa is supposed to be exceptional. It's not on my 'to do' list though.
Best of luck with the seed shopping.