The way to research that isn't to look for the make/model of your car, but to start by looking for a tire test and comparison.
Then, you look at the tires that has done well in the test, and see which are available in the sizes that your car takes.
Then buy the best rated ones that you can afford.
Fat tires are best in snow.
Directional tires are ideal for hard surfaces in good weather conditions. The best tires for driving in snow are snow tires.
Basically hey both do pretty good in snow. if its thick snow you will have a better time with the Mustang (also take an account of the Mustangs tires). The mustangs tires are kinda specifically designed for snow (and grip on the road). If it is thin snow or ice the Camaro would do better. Again take in account of the Camaros tires. The tires of a Camaro are designed to handle ice, have grip on the road, and to handle on thin snow (not thick snow like the Mustang).
Michelin mud and snow tires get great traction, but if you want the best traction go with studded tires.
Nokian Hakkapeliitta 5 studded snow tires are best snow tires for a 2004 Volvo XC70. But they are expensive, and check your local laws before you buy them. Studded snow tires are illegal in some areas.
Winter tires with studs are the best for driving in snow.
While all-season tires are popular and marketed to be able to handle all weather, when tested they fare less well than snow tires. So the best tires for winter are still those designed as snow tires.
The best rated 18 inch snow tires are the Nokian Hakkapelitta SUV 5. These have consistently been rated highly by consumers as reliable and good for snow use.
Snow tires!
One of the cars that perform best in the snow are Subarus. These cars tend to have four-wheel drive and great traction in the snow. Another great car for the snow is a Volvo.
Bridgestone Blizzak Tires are amazing tires for any sort of severe weather driving.
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.