Less traction on the snow, easier on the machine I would say. Maybe why they sit all summer. If they were good on dirt, you'd see them there. The tucker may be the exception to this however..As I now know they are used for specialty farming operations on dirt...
Lbs/in.sq on the tracks is the all important thing to consider with any snow cat. Below 1 lb/sq.in., and your all good I figure...
Regards, Kirk