Identical regular seeds grown in two different rooms can look like two different strains. Light intensity, pot size, feeding and temperature all change how a genotype expresses, so a friend's disappointing run of a line you loved may say more about their setup than the seeds. The difference between genotype and phenotype, and how much of what you see is environment, is unpicked on Regular Cannabis Seeds — Non-Feminized Packs for Breeding with paired photos from two grows. Judge a line on more than one run when you can.