The EPA no longer requires registration of dyes for ponds. The contents, Acid blue 9 and Acid Yellow 23, that are listed in Admiral and Aquashade are exactly the same contents in many if not all dyes for lakes and ponds. The clever marketing technique is representing that the dyes need to be registered with the EPA to be used in ponds. That is what you are paying for, something that is no longer required. I do agree that there are many strengths of dye available on the market today and with a little simple testing one can determine the relative strength of the product you are buying.
