Yeah because over the Internet we could solve this.
Based on how plants work, you can't. If a chemical or an organic clones was grown side by side, under the same conditions, you'd have no better than a 50/50 chance of guessing. Based on vegetable studies, no discernable difference can be found. There was no difference in the end product in those studies, I highly doubt cannabis would be an exception to the rule of a repeatable experiment carried out over fruits and vegetables.
It's all in your head.
Eta: yea, science bitch!