I bet 1-(thiophen-3-yl)-2-aminopropane would be amphetamine-like most people would not be able to tell it apart from (d)-amphetamine. However, this is just a guess, as a thiophenyl group is often considered isosteric to a standard phenyl group.
Cyclopentyl-phenethylamine, however, would probably be similar to cyclohexedrine--pertty nasty.