Have tried Super in 2 Prius (1.5 and 1.8), Lexus CT200H and my current 2014 Yaris Hybrid.
Conclusion = Waste of Money
No difference in performance or economy, no issues with any engine or fuel system..
Tesco Unleaded has been fine in all of my vehicles, including a Porsche 911 which only needed 95 RON.
The only vehicle that specified Super was a Jeep Grand Cherokee SRT8, so that was what it got fed, average consumption was 15.7 MPG, so it had a lot of it !