Here are 3 more snowcats that would be typical of personal use snowcats.
The Tucker is for sale, asking price is US $6000. It is from the 1950s or 60's. I had the information from the seller but can't find it now. Notice the tracks are very similar to the tracks of the Tucker Bus in Villi's photo above. They are also very different from the tracks in the photo I posted in my original reply because in that photo the tracks were not original.
The 2nd photo is a Thiokol Imp. This type of unit would have originally been used for worker transportation in remote areas, use at a ski area, etc. It is not configured as a ski slope groomer. This particular model is a 1974.
The final photo is an LMC 1200 that is also in private use. This would likely have been an old trail groomer or doubly duty machine because it has the open back area and a multi person cab. Most new units have seating for only a couple of people and are dedicated for their tasks. Groomers are highly specialized machines, transporters are generally of a different configuration.
If you look at most of these, you can see that most sit OVER the tracks, while the Snow Trac actually sits down in between the tracks. A Snow Trac will easily fit into a standard garage. Also most of these other units have levers for steering, while the Snow Trac uses a standard steering wheel. The Snow Trac turns very much like a car. The other 2 track units are capable of turning inside their own length, the Tucker and other 4 track units turn similar to the Snow Trac's SUV radius turns. Most 2 track units use a hydrostatic, or similar, type control that uses a huge amount of horsepower. The advantage of the Snow Trac is that the turning consumed almost no horsepower but the other style could use nearly 50% of the engines HP.
For what it is worth all these vehicles are cabable of climbing extreme grades. A Snow Trac, with only about 40hp, could carry a full cargo load (a ton) up a 70% grade while driving forward and 90% grade in reverse. Not bad for a glorified VW using a design that was initially developed for the US Army in the mid-late 1950's.