welcome to the best car ownership group around...no other car will get you so involved, well maybe a Jeep..
Depending on what your interests are for your car. Just A to B...spirited, or occasional track use...
RF tires will last longer and give you MANY more miles used for A to B.
Non RF will give better handling/ride/grip for the other uses of your car.
RF tires are heavy, that affects ride quality and transmits road noise. To Make a RF tire the carcass of the tire itself is 2 or 3x the thickness of the NON, in order to support the weight of a car after loss of pressure.
You will notice wheels following the road better when the weight is removed. A huge weight savings is had just in a different wheel AND tire,
both stock Mini pieces are designed for the A to B driver.
This could go on and on, but i'll stop here...many can tell you that I am hard on tires, on road and track, I know for which I speak.