well, it depends on who's og kush you're going to get.. there are tons of breeders out there all with an og kush... my personal fave og kush was from dr greenthumbs, his ghost cut... it was everything an og kush should be.. great taste, super smell and a bomb high as well.
i've also grown dna's sour kush, and it was a nice smoke, but i think i tended to like og kush a lil more.. i really love the smell and taste with a nice og kush...
i got the reserva privada og kush, think it was the special sour pheno that was the best of the best apparently, quite a stretchy plant during 12/12 if you've got plenty height in ur area then not a problem but if u wanna keep it short like i've had to with mine your yield might not be as impressive as something else, my jack and tangerine dream are a lot heavier with bud so far
i don't know what you're talking about, the og from dr greenthumbs i grew was straight up fire, my second highest rating plant thus far behind chocolate rain...
i've also seen a few other grows of it that looked even better then mine did...