Though neither are much like caffeine, pseudoephedrine might be described more caffeine-like compared to ephedrine. Pseudoephedrine feels mostly peripherally stimulating, in a sense it keeps your body awake more than your brain, no mood lift really or much clarity.
Ephedrine is a much more active stimulant than pseudoephedrine. Feels more amphetamine-like. But it still feels quite peripherally acting too. Ephedrine feels like the bastard child of pseudoephedrine and adderall.
Ephedrine is a much better stimulant than pseudoephedrine, even some potential for some mild euphoria. I remember taking some strong herbal ephedra tablets when I was 17 and feeling quite good. Never got much euphoria when i used bronkaid (ephedrine) as an adult but it definitely has some mood lift/antidepressant-like effects. Can also cause some fairly nasty irritability when it wears off though.