Close enough. E10 is enough to see most of the issues you will see with pure Ethanol. Most engines just need to run is different fuel maps. ideally you would make other changes (increase the compression ratio), but they are expensive.

Some engines (SAAB, I'm looking at you) will detect knocks and adapt the map on the fly.

Then, there's the more insane stuff:

https://www.motorauthority.com/news/1024086_ethanol-powered-...