It is these oxygenates that help turn harmful carbon monoxide emissions into harmless carbon dioxide. Since these oxygenates lean out the mixture, they enhance combustion and therefore reduce emissions. Since alcohol also raises the octane level, they can contribute to a better running engine if a previously used fuel did not meet the minimum octane requirements for that particular engine. It simply allows your engine to reach the performance that it was designed to operate at. Using a higher octane fuel than your engine requires will do nothing to increase performance.
Ethanol is a grain based alcohol and methanol is ether based.
While both ethanol and methanol are alcohols, methanol is more sensitive to water than ethanol. Methanol is also not as compatible with engine fuel systems as ethanol and thus you can't use as high a concentration. This means that if you are using this fuel and leave your boat unused for prolonged periods, you will have to add stabilizers during the boating season. While this sounds just like what the doctor ordered, it means that using this fuel for the first time will likely result in filters repeatedly plugging up as dirt and gum are dissolved from the boats fuel tank and lines. Since I have already warned of potential water problems associated with this fuel, it's wise to ensure that new water separating fuel filters are installed prior to it being used and that these filters be inspected and changed regularly.