E10 is better than E85. You've obviously fallen into the trap of the great marketing generated by the distributors of E85. Now I'm not calling you an idiot, please don't take offense to my post.
It's the same as when someone was saying a lower comp engine is better for turbo, when in reality and high comp engine will make more power and is naturally stronger. Often in trade we call them a low 'strength' engine and high strength. This has been covered before.