The structure is VERY different from Eph.
It's only similar to Amph.
Don't just watch the structure, check what's attached to it.
Anyhow, compare to Geranamine.
I am quite versed in looking at structures. You can't just look at the parent compounds but must also be familiar with the metabolites.
Look at the structures, do you honestly believe that geranamine is similar to amphetamine but different from ephedrine?