Shell V-power uses a GTL gas to liquid additive, basically C1 methane converted to a synthetic liquid fuel in a very expensive process. It's the only additive of this type in any fuel. All others use ethanol type boosters I believe.
your car will run fine on either, is super unleaded better, probably yeah, will you tell, probably no. Completely subjective.
For the record I use predominantly v-power, when I do stick normal stuff in I notice bugger all difference but I do buy into the hype that super fuels will keep your engine that little bit cleaner, or should that be make it get dirty that little bit less.
Worked for Shell on 2 occasions in my life and first time was directly involved in the dosing / measurement of ALL fuel additives.
As an aside all 3rd party fuel, supermarkets etc normal stuff is the exact same, and then all fuels, v-power included, use exactly the same feed stock before the additive is added which is directly at the loading nozzle into the tanker
I'd stick with the good stuff anyway but don't worry about putting normal stuff in at all