The tread pattern is different so the tire can dig downor bite into i the snow also the rubber is softer so the tire doesn't get brittle in the cold temputures.
I assume you are referring to the tread. High grip will have a more aggressive tread design used in off-road conditions or in deep snow. They are called off-road tires or snow tires. The difference is in the tread design.
Both Winter and Snow tires have a more aggressive tread pattern and are made of a softer rubber that grips better in cold weather. I believe that snow tires have a still more aggressive tread pattern than winter tires.
AT = all terrain. MS = mud and snow. The MS tires should be more aggressive.
Directional tires are ideal for hard surfaces in good weather conditions. The best tires for driving in snow are snow tires.
The difference is where you live.
In some places where it snows alot you have to buy snow tires. So if you have snow tires then yes you can drive if the snow is 8". But if you don't want to buy snow tires, you can get a chain and wrap it around all of your tires.
Yes, studs can be removed from snow tires.
There is very little difference between a snow blower and an electric snow shovel. Both are effectively snow blowers which use power to move snow rather than manual labour.
You can install 4 snow tires but it is really not necessary. Only install the snow tires on the drive wheels.
yes, AT "all terrain" tires are MS "mud and snow" tires.
If you drive in snow you have to, regardless of the vehicle make. -The snow tires are your link to the road.
Snow tires cost slightly more than all weather tires. The actual cost of the snow tires would depend on the brand, style and size.