Which is better - 90 octane no ethanol or 93 octane 10% ethanol

I quit running 93 with ethanol
Switched to 90 no ethanol. Def way to go. Ethanol is hard on fuel system if they sit.
Especially small engine like mowers. Chain saws. Etc.
I say 90 no ethanol is my choice. I run it in my 75 408 duster driver and it ran 11.0's at drag strip on it.