the effects of classic psychedelics and weed are additive,
as for differences,
lucy starts off more lucid
while weed makes you a bit sleepy and makes your eyes red and maybe squinty,
and it makes your skin more sensitive inside and out - like hungry horny which is special.
but as for psychedelic patterns they both work the same way,
and they are the same also when it comes to loops, tracers, time dilation, entities, voices, dimensions, etc.
weed is right up there with the classics. I think of these similarities as the classic psychedelic effects.
back to the soma question
I think the ephedra could be part of a soma recipe, imparting a wakefulness element to a cannabis brew