Ummm, Ethanol keeps the engine internals cleaner yes, but actually ethanol makes MORE power. Engines that can use E85 make much more power, or can make more power that if run on straight gasoline. You can run way more boost and more timing using more ethanol fuel in the mixture vs straight gasoline. It also runs cooler too. Lots of benefits using ethanol from a performance standpoint.
Ethanol also will carry moisture thru the fuel system allowing it to burn and prevents freezing up in cold weather. In the "olden days" prior to ethanol in the fuel, people had to add HEET which is just Methanol alcohol or isopropanol alcohol to prevent these freeze-ups and moisture from plugging up the fuel lines and pumps. With Ethanol fuels you don't need to add a supplement of alcohol which is another benefit.
The only issue with ethanol fuels is they don't like to sit for extend periods as it will pickup moisture out of the air which can be a problem. Ethanol free fuel is best for sitting for extended periods in fuel tanks or engines that don't get used as often.
Either way, I don't see that there would be a difference in ethanol fuels in regards to the VR&P in cleaning the pistons and rings and engine internals up.