There is a reason meth is far more popular for recreational use than adderal is. Its true that the effects of the drugs would be much more similar at equivalent doses, but I don't think this is a useful comparison. You could make the same comparison between effectively any two stimulants. This does not mean they are all similar in any meaningful way. All it means is that they all provide mental stimulation, which is kind of the point. The only thing accomplished by making this comparison is furthering the stigma that people who are prescribed stimulants are actually just addicts.

While meth can provide an effect similar to a normal dose of adderal, no meth user actually takes that small of a dose. No one who casually reads that the effects are similar is going to understand that. They are going to assume adderal users are constantly high out of their minds on legal meth.