I have never had different kinds of dmts... I've had vastly different trips. some visual, some internal and less visuals, some out of space and time, some I can't ever remember, some brought me to a parallel world. the thing is, it's unpredictable. Just because one small dose of it felt different than your other batch doesn't mean anything.
The taste etc. shouldn't be different if you have clean spice. It being yellow is usually plant residues in there. You can clean it up or leave it that way. They migrate into the solvent sometimes, if the bark is powdered super finely, or the lye breaks it up for long enough, or maybe it has something to do with the solvent as well. Generally it's nothing terrible. Unless your spice is blue or some unnatural color...
When you say "cleaner", refering to the evap of your ligher fluid, that sounds like it's still not fully clean... Like, do you really want to use something that does not evaporate 100% when you leave it? Remember you are putting this in your body, into yourself. There is no way you'd get me to smoke anything that wasn't made with clean chemicals.
Buon viso a cattivo gioco!
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The Open Hyperspace Traveler Handbook - A handbook for the safe and responsible use of entheogens. ---
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energy conserving caapi extraction