I have a 2020, so the ancient previous version. My observations are as follows:
Car can use E10 (regular unleaded 95RON, UK) or E5 (super unleaded 99RON, UK) from my local petrol station.
Tried both.
E10, cheaper, but lower performance feel (could all be in my head though) and lower MPG
E5, currently 7p more per litre. Better performance feel, higher MPG.
The higher MPG (anecdotal, not measured) is actually cheaper overall, I certainly refill to full tank far less often.
Price difference on a full 56 litre tank is only £3.92, with my usual driving (heavy footed) that gives me 50 miles for every £10, or 20p a mile in fuel.
And I'm OK with that!