The shell garage where i live has closed down and closest one to me is esso do any you guys use the esso super unleaded in your cupra r. I have always used v power since i have owed the car would there be adverse effects on using the super unleaded from esso beging that is is only 97 ron and not 99 ron ?
Mate you will be totally ok running 97ron, and TBO if its really even 97ron(or 99ron) by the time it gets into your car.
As mentioned above you may get CF's but the timing will only be retarted slightly, but honestly we don't all drive it like were on an RR on a daily basis(well not all of us

).
Also in relation to ECU learning, i think this is BS, these ECU's adapt very quickly, if there is more octane in there you will get extra bang for your buck and it is less prone to early detonation.
I put my car on a RR once as a test with 95 ron, it made 240bhp, then i added some millers CVL, 2 runs later and it made 260bhp, so this thing about ECU learning i think is a bit misleading.
If you plan on ragging it around get the good stuff, for a daily driver fire in 95/96/97ron which ever is freely available to you and your pocket.