Snow raining down from above, ice-covered road conditions beckoning, and eight-foot snowbanks on either side - surely the ideal conditions for testing out Porsche's new drop-top roadster, the 2013 Porsche Boxster S, right? Not exactly - but when you get the call to attend Porsche's Camp4 winter driving school and put in some sideways seat-time in one of the world's best driver's cars, you don't say no. I trekked up to the Mecaglisse rally school in Quebec, Canada to test out the 2013 Porsche Boxster S in some of the slickest conditions that the entry-level sports car is ever likely to see, and the experience was an illuminating one that illustrated several key differences between the Porsche and it's own in-house competitor: the 911 Carrera.