I did 3 WOS Afghan kush and 3 WOS afghan kush special as part of a 20 strain multi grow a few months back. the normal was just shit, shit yield & shit smoke. The special was a little better, had quite a dirty smell to it, didn't really translate to the taste though, overall they were both probably 2 of the worst strains in the grow. They lack vigour and tatse.
From what i've read recently some decent afghani kush is female seeds pure ak, supposedly you can find the cherry pheno in it like you used to be able to get in serious ak47.