I have used both without any noticeable difference, except maybe how quickly the smoke residue softens. Soaking 15 - 20 tokens for about 2 minutes softens the stain where in rubs off easily, by the time I get to the last one it has been soaking for about 10 minutes, and the stain is just laying on the surface and instantly wipes off. Beats weeding by miles. I prefer to buy the higher concentrations. Acetone works too, but alcohol is kinder to my olfactory orify. 
I haven’t tried denatured or vinegar.
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