michelin tyre's are much better than cooper tires I'm sure but i prefer Pirelli tires anyway. Its best to compare the specific tire that you are looking at, there can be alot of differences between tires even within a brand
I believe Cooper Tires do
Michelin is considered to be a higher quality tire, however not all Michelin's are the same. For example Michelin has had a lot of problems out of its Energy LX4, but the Cooper Touring CS4 is one of the better tires on the market. The best thing to do is to research the individual tire that you are looking to buy.
Onlinetires sells Cooper tires at a discount. The Cooper Cobra G/T 82T tires that retail for $94.21 are sold for $78.51. Discount Tire Direct also gives discounts but Onlinetires gives the best prices.
If you want to buy tires from the very best manufacturers; American tire manufacturers are still the way to go. American tire manufacturers like Goodyear and Cooper Tires still produce and manufacture of some of the highest-rated tires available today. These quality American companies devote large financial resources to research and development to make better and safer tires for American drivers. Furthermore, these companies aggressively price their tires to be competitive with cheaper, lower quality imported tires.
It seems that Cooper Disocoverer STT tires are for off-road purposes; a search on internet with the given keywords reveal results that they perform the best for off-road applications. You may like to go through these links-http://www.offroaders.com/tech/AT-MT-Tires/Cooper-Discoverer-stt.htm; http://www.offroaders.com/tech/AT-MT-Tires/Cooper-Discoverer.htm
Cooper Tires makes Arctic Claw - I had 4 on my last mini van and vouch for them as the best snow tires I've ever had.
The best places to purchase auto tires at a discounted price are: Tire Rack, Discount Tire, Tire Buyer. Tire Rack is BBB (Better Business Bureau) A+ rated.
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.
Bridgestone has been rated consistently as one of the best tires on the road.
The Cooper Discoverer S/Ts aren't to shabby,if you want to drive on the road too an all-terrain might be better but their not the greatest in the mud.
Go to the Cooper manufacturer website. They have a list of all the different types of tires they offer. As well they have contact information there if you want to email them or phone them for more information. I suggest contacting them directly to get the best answer.