My 2018 4x4 TA always has E5 and has done so since I bought it new. If I can get it, and I always can , locally, it prefers Esso
I can't do a comparison with E10 in the car because I have never used the stuff in the car
What I can say for certain that recently I was forced to do a fill up of E10 in my Vincent Black Shadow engined Egli Special bike(almost out of fuel and nothing else available) and it was dramatically down on power, got very very hot, and generally ran badly. I coaxed it home where the engine died outside the garage and would not start at all until stone cold again..
Drained the E10 off (put it in my wife's fuel injection scooter which did not complain) filled the Egli with Esso E5 and all was well.
For those not in the know the Black Shadow engine can trace it's roots back to about 1936 (although the Shadow first came out in the 1940s) and obviously has carbs as opposed to injection.. By todays standards it is an ancient bit of kit, but will always be a masterpiece of design and manufacture.
Before you disagree get a ride on a well set up Vincent Black Shadow, and marvel at the product of the "Two Phils" all those years ago
