Alright, I compared the labels between the two, and indeed the Classic Trimec has more active ingredients in the same 1-gallon container as the diluted stuff. My question is this: Do both products, when mixed properly, have the same amount of potency for knocking down weeds? From the little that I understand (am studying for my private appl lisc), it simply takes more of the diluted product to be mixed with say a gallon of water? Someone please explain. Why does PBI Gordon distribute two different products of the same name but with different concentrations.