[loochypooch]

Same tek for any active trich.

That is correct that white spines are KK242. The confusion comes in when I tell you that KK242 is a type of Peruvianus -- that is, it is often sold as Peruvianus because many consider it a Peruvianus, so they are not lying.
More accurately though we here at 'topia have come to a unified conclusion it would be better titled T. Cuzcoensis since it comes from Cuzco. The name T. Peruvianus KK242 or T. Peruvianus var. Cuzco is a little deceiving IMO. There are figures in (Trouts notes I think) listing Cuzcoensis at having only trace elements of mescaline (trace means none basically). Taxonomy of cacti is obviously not the precise science you'd think!