Pure kush vs og kush vs og kush #18

My friend tells me pure kush is bought for 8000 a pound at dispensaries. But it produces very little. I figured it is one the best out there. What is better out of the three? #18 is very similar to the og right? I missed the chance to get it. I thought it would produce low like the pure... Any insight is appreciated.

get the purple kush it has the best tast and has higher yeailds depending on your grow room it is the best out of the 3 seeds i belive it all depends on your preferance of weed