Odd as this review site ...Well, the M+S tires that comes with the grip control option are _not_ approved as winter tires in Norway. You should consider winter tires for Nordic regions if you drive a lot on snow. All the big manufacturers make them.
If you prefer Continental, then they have some studless that perform well in winter conditions: Conti Viking Contact 6 (some sell 5, but that's the older model).
Edit: had a look at Continental.no. The Mud & Snow tire you mentioned is listed as a summer tire. Don't use it during the winter!