From my findings (I am a double wicker with main line), if you compare a wellmade (proper combinations - wax, wick, FO, etc.) single wicked candle and a wellmade double wicked candle, the throw will be stronger in a double wicked candle. Athough, there can be duddy double wicked candles as well as duddy single wicked candles. A wellmade single wicked candle can do really well though in smaller areas and even in larger areas if it happens to have a kick butt throw. I find that candles that are single wicked in a jar that is too wide to get hot enough will definitely not do as well as the same jar with two wicks. Some jars have to be single wicked and do fine in smaller areas. I have always preferred a great burning double wicked candle for scent throw over a single wicked candle. I have burn many candles, not only the ones I have made but many from other companies. I find that the double wicked candles normally win handsdown over a single wicked candle scent throw wise, but I have made a few kick throw single wicked candles for their size, including tealights. HTH