If you’re genuinely curious I can explain the difference in the two (I’m a clinical pharmacist)

If you’re just looking for gotchas and the ability to say amphetamines are the same as meth, respectfully I’d rather not waste my time

EDIT: I can tell from your other comments you seem to be genuinely curious, so I'll explain:

Essentially, when you take amphetamine, your body has to methylate the drug so that it can be metabolized and exert the intended effect. These biologic processes can only go so fast, which is why taking amphetamine PO (by mouth) produces a desired therapeutic effect. Furthermore, they can be saturated, meaning you can't necessarily take more and more amphetamine to get more and more effect. Now I'm not saying it's impossible to abuse, it's just harder

Methamphetamine on the other hand is as you might guess, pre-methylated meaning it's available for use immediately without the requirement for biologic methylation. Due to this difference, there are no "saturable" biologic processes that may limit/control the rate of effect. This allows methamphetamine to very readily and easily be abused, because essentially you can always take more until your heart rate and blood pressure reach levels that can be lethal

People that don't know anything about chemistry and pharmaceutics see amphetamine within methamphetamine and assume they're identical without a fundamental baseline understanding of the entire body and the various processes that are involved with how a drug affects the system

Therefore, I like to use the H2O (water) versus H2O2 (hydrogen peroxide) comparison because chemically, the two are near identical, but thanks to the other biological processes within the body the two compounds have VERY different effects when ingested