42, The meaning of life
Join Date: Jul 2009
Location: Melbourne, Australia
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Welcome to the Werkz.
Again, not a mechanic. What I'd suggest is to try using a tank of each in your usual travel routines, and see how they stack up from two perspectives,
a) how you feel the car performs.
b) the mileage that you get from the fuel that you use.
I don't think that this sort of test is likely to cause any damage to an engine, but it will give you something to work with. The engine management system in your car should adjust for the octane of the fuel that you are using (at least to some extent).
Put up some photos of your car when you have a chance, and hang around a while.
Riding in style