I ahve a set of re92 on a set of wrx stock wheels for my subaru and yes i have driven in the snow with them. these tires have a much better compound in how they deal with changing conditions. in snow they are nice and soft and really dig in nicely. I never had a problem with slipping unless I pushed the car. On dry pavement or even wet these tires have a stickiness to them that is very nice. they are very surefooted. The re92 tires are ok I have never had a problem with them but they wear very fast are not as sticky and don't cope with changing conditions very well. Neither tire is a sport tire. the michelins I am running are 225/45/17 while the re92 are stock wrx size.
Oh and to answer the sidewall question I have driven re92 in this 17 inch size also and yes the sidewalls are stiffer on the michelins