I understand that they create somewhat different effects, but if you had to compare the two, about how many milligrams of 4-HO-MET would it take to equal an eighth of mushrooms?
The issue is potency. We don't know how strong your shrooms are. I've had shrooms where an eighth is equivalent to 40 mg 4-AcO-DMT (I haven't tried 4-HO-MET so I can't make a comparison there). If you've tripped before you should probably easily handle up to 20 mg but it would be prudent to start a bit lower.
maybe you mean under 30mg that it resembles shrooms....
anyway, to the op question, i find these synthetic rc to be reminiscent but not equal to mushrooms. just my opinion though. also depends what you are looking for, visuals, euphoria, insights, but i generally find these type of threads (that try to equal one substance to another) to be rather pointless
have a good time though! its a nice chem to try this one....