How does it make a difference? Do your bikes sit for periods of time without use? If so how long and what problems have you had with "E" fuel?
The only time the bikes sit for long periods is in the winter, and the stabilizer is absolutely necessary. However, even when I ride often, the ethanol treatment is necessary. For example, I usually ride my scooter when the wife is not with me, so the Spyder sat unridden for several days (I was out of the ethanol treatment for that last 2 fill ups on it). It was very hard to start after sitting for less than a week. Once I got it started, I immediately went to Walmart and bought a bottle so I could add some to the gas.
Again this week, I have ridden the scooter only. When I went out yesterday morning to start the Spyder to go on a Patriot Guard ride, it fired right up because I had the ethanol treatment in it.
The ethanol in the gas is crap, just government mandated garbage to help special interest groups. My bikes run significantly better when I add the ethanol treatment. You may not have any troubles with the 10% ethanol fuels, but I do so I do what I can to counter it. Thankfully, the scooter only requires half an ounce each fill up, the Spyder needs 2 ounces per fill up. Both bikes require 93 octane and the only ethanol free gas near me is 87 octane.