I would have thought the criteria for "best alcohol stove" would be the one that uses the least amount of fuel (most efficient) with boil times being pretty irrelevant? If your objective is to carry the least amount of fuel (weight) needed to do the job, then does it matter if your 500mls takes 3 minutes or 10 minutes to boil?
If it's just about bragging rights, then my Jetboil Sol will boil 500mls of cold water in 1 minute, 45 seconds using 6 grams of gas.
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