Cooling system pressure

After some interest on my part, I went and pulled the MSDS sheets on both the water-less fluid and standard Ethylene Glycol concentrate anti-freeze. From what I can tell The $42/gal is just EG coolant concentrate at 85% when most of the others range from 55%-90%. They all appear to have a salt and an anti foam chemical as well.
Someone want to explain the hype and the price tag?