Ephedrine is a dirty jittery stimulant with strong peripheral sideffects. I'd say it's ~1/5th the strength of amphetamine mg per mg as a stimulant, but 1-2x as effective at producing peripheral sideffects, just to throw out some real ballpark figures based on personal experience, which may be inconsistent with that of others (see below).
Pseudoephedrine is a decongestant. I have never observed any stimulant effects, peripheral or central, from pseudoephedrine, and i'm normally quite sensitive to stimulants (I take amphetamine in the 1mg range therapeutically for ADD, and get a high off of 2-3mg of amphetamine, and similarly low quantities of most other stimulants).
Also, what's with this "is classified as an amphetamine"? By whom? Based on what criteria? When people just throw around classifications like that, without making it clear what the definition they're using is, the claim is deceptive... Ephedrine is structurally related to amphetamine (being 1-phenyl-2-methylamino-propan-1-ol, or beta-hydroxy-methamphetamine), and produces stimulant effects via a similar mechanism, just nowhere near as well. I could name a bunch of chemicals that are structurally related to amphetamine and are psychoactive which aren't stimulants, or are not straight stimulants, etc, which still could be classed as amphetamines.