I thought: if this SI is "fun enough" I can sell the Subaru BRZ and simplify my life. So, I took the new sedan SI with normal (not "summer") tires on a twisty road, and: it is FASTER, but it is NOT a BRZ on the turns. I'll keep both cars. Snow-tires (I'm in New Hampshire) will go on the SI around Thanksgiving. Snow-tires will never go on the BRZ. All is well.