Like most modern engines, the 2.0TFSI adapts to the fuel it is using.
If you look in your filler cap (certainly in mine!) it has 89 in big letters, and 95 in small letters, recommending you use 98RON over 95RON. By no means you will doa ny damage to the engine, but whatever fuel you use, the adaptation of the ECU with adjust a degree of timing to the appropriate level, pulling back when using a lower octane fuel.
so for best performance, octane numbers are king. Many people will say super fuels are a waste of time, but certainly in this engine, it is not the case.
Regarding remaps, you may see more of a benefit using the highest octane. Certainly with Revo maps and APR maps, you can adjust the map the car is currently using, to a 95RON or 98RON version. This advances the iginition timing to take advantage of the higher octane levels where there will be less chance of knock or timing pull present.