From what I saw, they were talking about what levels of various gases caused health problems. They then went on to discuss their results from using Hydrogen Peroxide and how much was required for optimal results.
Nowhere in there did they mention post-digestive enzymes being ADDED to reduce odor levels. They DID however say that the optimal ratio for Hydrogen Peroxide was 82mL / 500g (1 mL is the volume of 1 gram of water). So, 1 part Hydrogen Peroxide to 6 parts animal waste ... not very effective.
As far as I know, Hydrogen Peroxide and Potassium Permanganate are NOT enzymes. So while they may be effective (if enough is added), I don't see how they compare to ENZYME based solutions that EESO has to offer.