wikipedia says that 4-MeO-DMT is much weaker than 4-HO-DMT (psilocin) and 5-MeO-DMT.
http://en.wikipedia.org/wiki/4-MeO-DMT
I updated this wiki page because there was an erroneous mentioning of psilocybin as a metabolite but the correction. Without planning on it I also added extra information and speculation. Or you might call it educated suggestion perhaps. But I got a bit carried away and am not sure if I made errors or passed off guesses too much as fact - anyone with some understanding on such subjects is welcome to check it, I'd appreciate it.