I think you’re comparing apples with oranges in comparing these two cars. But to try and give you a guide I would say the build quality of the Aurion is a little better than that of the SS. I would also say the Aurion’s V6 engine is of a higher quality and standard than the SS’s V8, and would use less fuel, but I would say that both are equally drivable and practical in city traffic. My feeling is that the SS is an emotional purchase, the Aurion a safe one.