As far as I know there should be major no difference between these two acids for the acid soak. If anything, citric might be a little better because 1) it's got a lower pKa & can make the pH lower to (theoretically) better break apart plant material, and 2) it doesn't smell as bad as vinegar.

The only possible downside of citric I can think of is it possibly getting into the limonene, due to its high water solubility. No idea if this has any basis in reality.

Which would you go with if you were doing an extraction from, say P. Torch? Can you think of any reasons not to take citric acid over vinegar, assuming you had ample amounts of each?

Vinegar would be better. Mescaline acetate is far more water soluble than mescaline citrate and so more will be extracted in the initial water phase.

i have personally boiled cacti with
citric (lotsa lemons)
sulfuric (fish aquarium ph down)
hydrochloric (muriatic concrete cleaner)
acetic (vinegar)

i'm a lazy hippie sometimes, i use what is at hand.

i have also salted with each of them, and boiled to reduce ( although i believe in careful accurate titration, so no excess acid is ever present!) i'll stick with sulfuric for salting because it is easy titrate with, readily crashes out easier than other salts ime

i'll write up my most recent salting adventures soon

now i dont use any acid when making tea for extraction, totally not needed. if stb works (it does) then why use any acid?
none was used in anything i have done in years

@dg - where do you get your sulfuric acid for salting? Do you use aquarium ph down, or do you have a food-grade source?

is there a food safe version of hcl os sulphuric?
i had some analytical lab grade sulphuric, but it ran out, so the aquarium stuff works fine for now

acetate>citrate
2 cents