Only well benefit engines with high compression engines like Toyota 86 or Civic Type R. Butt dyno may tell you differently lol

Yes it will also benefit from the higher RON fuel.

A few post ahead mentioned that RON is just an indicator to the resistance to uncontrolled self ignition of fuel in the engine. How efficient in burning the fuel really depends of a lot of other factors plays a bigger role like fuel mixture, piston head design, spark plug design etc. For example if you tune an engine rich, the potential of hydrocarbon release in the exhaust stream will be more than a lean tune. That is when you can see flame coming out of the exhaust. Regardless of what RON rating fuel used.