What is the difference between methamphetamine and bupropion?

OK… So I know there’s a clear difference between the two… But they both have very similar side-effects… Besides methamphetamine being much more addicting and with more severe side-effects, are there any other differences?
I just basically need to know this because I’m having this argument with a friend, and apparantly I need proof to show the similarity between the two… So any links or sites anyone can find linking the two would be great… 🙂
Hey, sorry… I didn’t mean the structural differences… I was just wondering if anyone else saw the similarities they had on their effect on the body (such as allowing the body to absorb more of the same hormones, having the same side-effects (with crystal meth’s being worse), and with bupropion even being used to stop crystal meth cravings)… I don’t know, it seems pretty evident to me, but I need some sort of proof (or more proof than this at least) to show this.

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