For my 95GL V6, it's P195/65R14

At Wal-Mart, there is only one choice:
-- Douglas 40,000 miles warranty
$43x2+$20(labor)+$9(tax)=$115

At Sears Auto center, the cheapest one is:
-- Cooper 40,000 miles warranty
$33x2+$20(labor)+$11(disposal)+$9(tax)=$106

Does the quality of these two tires have
some difference?
It seems Cooper is cheaper than Douglas,
but they provide the same mileage warranty.

Which tire do you feel better?

Thanks for your opinion.