The method of ingestion, we all seem to agree, is the main difference because of how fast it hit's and because of duration.

Oral DMT and shrooms are very simmilar. There is a great deal of consensus about that.

The experience of smoked DMT is for a large part determined by the  catapult effect, wich you don't have with shrooms if taken in the traditional manner.

I expect though, that smoked, snorted or sublingually taken pure psilocin, psilocybin or 4-AcO-DMT, would be very simmilar in this respect. Duration would also be a difference here.

I am often fantasizing about taking free-base shrooms, but i never get to actually doing it because i am just way too much in love with ayahuasca.

If anybody here has ever done such a thing, i would be curious to here how it compares.